--- /Base64.java	2023-07-05 03:13:19.342025555 +0200
+++ /Codec-1/src/java/org/apache/commons/codec/binary/Base64.java	2023-07-05 03:13:19.346025556 +0200
@@ -586,7 +586,7 @@
 
         // if bigInt is exactly byte-aligned, just skip signbit in copy
         if((bigInt.bitLength() % 8) == 0) {
-            startSrc = 1;
+startSrc = 4;
             len--;
         }
 
