Check array lengths before passing them to C

[ldk-java] / src / main / java / org / ldk / util / InternalUtils.java

diff --git a/src/main/java/org/ldk/util/InternalUtils.java b/src/main/java/org/ldk/util/InternalUtils.java
new file mode 100644 (file)
index 0000000..692639d
--- /dev/null
+++ b/src/main/java/org/ldk/util/InternalUtils.java
@@ -0,0 +1,10 @@
+package org.ldk.util;
+
+public class InternalUtils {
+    public static byte[] check_arr_len(byte[] arr, int length) throws IllegalArgumentException {
+        if (arr.length != length) {
+            throw new IllegalArgumentException("Array must be of fixed size " + length + " but was of length " + arr.length);
+        }
+        return arr;
+    }
+}