Crashing if invalid BASE64 String Given

[dynamitechetan]

java.lang.IllegalArgumentException: bad base-64

in this line :
byte[] decodedCipherText = Base64.decode(base64EncodedCipherText, Base64.NO_WRAP);

This occurs when base64EncodedCipherText is not a proper BASE64 value . Write something to check for a proper BASE64 and then pass it to the function.

[dynamitechetan]

I figured it out ...

 String pattern = "^([A-Za-z0-9+/]{4})*([A-Za-z0-9+/]{4}|[A-Za-z0-9+/]{3}=|[A-Za-z0-9+/]{2}==)$";
                            Pattern r = Pattern.compile(pattern);
                            Matcher m = r.matcher(msg);
                            if (m.find()) {
                                encryptedMsg = AESCrypt.decrypt(pass, msg);

                            } else {
                                encryptedMsg = "Error Decrypting...Please try again";
                            }