X-Git-Url: https://git.nmode.ca/signal-cli/blobdiff_plain/184354ffb71ea643b62c01c8406402ea4f492ac1..b2efef4d8c3238b413fe9fe758bd6a5c428498a2:/src/main/java/org/asamk/signal/util/Util.java

diff --git a/src/main/java/org/asamk/signal/util/Util.java b/src/main/java/org/asamk/signal/util/Util.java
index 5a1dcdda..f0d39601 100644
--- a/src/main/java/org/asamk/signal/util/Util.java
+++ b/src/main/java/org/asamk/signal/util/Util.java
@@ -2,6 +2,10 @@ package org.asamk.signal.util;
 
 import com.fasterxml.jackson.databind.JsonNode;
 
+import org.asamk.signal.GroupIdFormatException;
+import org.whispersystems.signalservice.internal.util.Base64;
+
+import java.io.IOException;
 import java.io.InvalidObjectException;
 
 public class Util {
@@ -39,4 +43,12 @@ public class Util {
 
         return node;
     }
+
+    public static byte[] decodeGroupId(String groupId) throws GroupIdFormatException {
+        try {
+            return Base64.decode(groupId);
+        } catch (IOException e) {
+            throw new GroupIdFormatException(groupId, e);
+        }
+    }
 }