HTTP Status 500 - Null input buffer

type Exception report

message Null input buffer

description The server encountered an internal error that prevented it from fulfilling this request.

exception

java.lang.IllegalArgumentException: Null input buffer

javax.crypto.Cipher.doFinal(Cipher.java:2127)

com.lib.Encrypt.decrypt(Encrypt.java:29)

com.lib.DecryptUtil.fileDecrypt(DecryptUtil.java:36)

com.encrypt.Action.execute(Action.java:59)

sun.reflect.GeneratedMethodAccessor38.invoke(Unknown Source)

sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

java.lang.reflect.Method.invoke(Unknown Source