1 files changed, 57 insertions, 0 deletions
diff --git a/toolkit/xre/detect_win32k_conflicts/src/ffi.rs b/toolkit/xre/detect_win32k_conflicts/src/ffi.rs
new file mode 100644
index 0000000000..826f452726
--- /dev/null
+++ b/toolkit/xre/detect_win32k_conflicts/src/ffi.rs
@@ -0,0 +1,57 @@
+/* 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/. */
+
+//! C foreign-function interface for this crate
+
+use super::detect::{get_conflicting_mitigations, ConflictingMitigationStatus};
+
+/// C FFI for `get_conflicting_mitigations`
+///
+/// Checks the current process to see if any conflicting mitigations would be enabled
+/// by Windows Exploit Protection
+///
+/// `conflicting_mitigations` is an out pointer that will receive the status of the
+/// Win32k conflicting mitigations
+///
+/// On success, returns `1`. On failure, returns `0` and `conflicting_mitigations` is left
+/// untouched
+///
+/// # Safety
+///
+/// `conflicting_mitigations` must not be a non-const, non-null ptr and **must be initialized**
+///
+/// # Example
+///
+/// ```C++
+/// void myFunc() {
+///     ConflictingMitigationStatus status = {}; // GOOD - value-initializes the object
+///     if(!detect_win32k_conflicting_mitigations(&status)) {
+///         // error
+///     }
+/// }
+/// ```
+#[no_mangle]
+pub unsafe extern "C" fn detect_win32k_conflicting_mitigations(
+    conflicting_mitigations: &mut ConflictingMitigationStatus,
+) -> bool {
+    let process_path =
+        std::env::current_exe().expect("unable to determine the path of our executable");
+    let file_name = process_path
+        .file_name()
+        .expect("executable doesn't have a file name");
+
+    match get_conflicting_mitigations(file_name) {
+        Ok(status) => {
+            *conflicting_mitigations = status;
+            true
+        }
+        Err(e) => {
+            log::error!(
+                "Failed to get Win32k Lockdown conflicting mitigation status: {}",
+                e
+            );
+            false
+        }
+    }
+}