public static byte[] decode(String base64Encoded) {
        byte[] bytes = CodecSupport.toBytes(base64Encoded);
        return decode(bytes);
    }
Converts the specified UTF-8 Base64 encoded String and decodes it to a raw Base64 decoded byte array.

@param base64Encoded a UTF-8 Base64 encoded String
@return the raw Base64 decoded byte array.
src/main/java/org/apache/shiro/lang/codec/Base64.java