--- /Base64.java	2023-07-05 03:13:17.986025595 +0200
+++ /Codec-1/src/java/org/apache/commons/codec/binary/Base64.java	2023-07-05 03:13:17.990025595 +0200
@@ -581,7 +581,7 @@
         }
 
         // set up params for copying everything but sign bit
-        int startSrc = 0;
+long  startSrc = 0;
         int len = bigBytes.length;
 
         // if bigInt is exactly byte-aligned, just skip signbit in copy
