1 files changed, 25 insertions, 0 deletions
diff --git a/src/main/java/de/thedevstack/conversationsplus/utils/UrlUtil.java b/src/main/java/de/thedevstack/conversationsplus/utils/UrlUtil.java
new file mode 100644
index 00000000..50c42288
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/utils/UrlUtil.java
@@ -0,0 +1,25 @@
+package de.thedevstack.conversationsplus.utils;
+
+import java.net.URL;
+
+import eu.siacs.conversations.utils.CryptoHelper;
+
+/**
+ * This utility class provides helper methods to handle URLs.
+ */
+
+public final class UrlUtil {
+    public static byte[] getIvAndKeyFromURL(URL url) {
+        if (null == url) {
+            return null;
+        }
+        String reference = url.getRef();
+        boolean linkHasIvAndKey = reference != null && reference.matches("([A-Fa-f0-9]{2}){48}");
+
+        return linkHasIvAndKey ? CryptoHelper.hexToBytes(reference) : null;
+    }
+
+    private UrlUtil() {
+        // Helper Class
+    }
+}