1 files changed, 2 insertions, 2 deletions
diff --git a/src/main/java/de/pixart/messenger/http/HttpDownloadConnection.java b/src/main/java/de/pixart/messenger/http/HttpDownloadConnection.java
index 7326cbf4b..9f49ac218 100644
--- a/src/main/java/de/pixart/messenger/http/HttpDownloadConnection.java
+++ b/src/main/java/de/pixart/messenger/http/HttpDownloadConnection.java
@@ -98,7 +98,7 @@ public class HttpDownloadConnection implements Transferable {
             message.setRelativeFilePath(filename + "." + extension);
             this.file = mXmppConnectionService.getFileBackend().getFile(message, false);
             final String reference = mUrl.getRef();
-            if (reference != null && reference.matches("([A-Fa-f0-9]{2}){48}")) {
+            if (reference != null && AesGcmURLStreamHandler.IV_KEY.matcher(reference).matches()) {
                 this.file.setKeyAndIv(CryptoHelper.hexToBytes(reference));
             }
 
@@ -383,7 +383,7 @@ public class HttpDownloadConnection implements Transferable {
             message.setType(Message.TYPE_FILE);
             final URL url;
             final String ref = mUrl.getRef();
-            if (ref != null && ref.matches("([A-Fa-f0-9]{2}){48}")) {
+            if (ref != null && AesGcmURLStreamHandler.IV_KEY.matcher(ref).matches()) {
                 url = CryptoHelper.toAesGcmUrl(mUrl);
             } else {
                 url = mUrl;