java - AES File Encryption/Decryption -

objective: pick file jfilechooser take file pass encryption method, encrypt file encrypted file upload file server via. upload method have or more particular line of code 'uploadedfile = client.uploadfile( "/" + nameof ,dbxwritemode.add(), inputfile.length(),his);'

problem: normal upload works fine without encryption involved when trying encrypt file not go through along "key" not being able put inputfile , server not accept file please see code.

question: how integrate encryption code work appropriately , combining uploadfile method , encryption methods have

working code below has no encryption

public void uploadfile() throws dbxexception, fileloadexception,   ioexception, exception {      try{          //auth method          phonehome();      }catch(ioexception e){          system.out.println("not saving accesstoken");          joptionpane.showmessagedialog(null, "your access information  not exist,\n please login"+                 "please login clicking 'ok'");         drop(); // run auth method user login     }     fc = new jfilechooser();     fc.setmultiselectionenabled(true);     fc.setfileselectionmode(jfilechooser.files_and_directories);     int dialog = fc.showsavedialog(this);     if (dialog == jfilechooser.approve_option) {         inputfile = fc.getselectedfile();         inputfile.getname();         inputfile.getabsolutefile();         string nameof = inputfile.getname();         system.out.println(" file: " + inputfile);           fis = new fileinputstream(inputfile); // file being sent upload dropbox         uploadedfile = client.uploadfile( "/" + nameof ,dbxwritemode.add(), inputfile.length(),fis);             }      communication.append("");     system.out.println("uploaded: " + uploadedfile.tostring());     communication.append("uploaded: " + uploadedfile.tostring());       joptionpane.showmessagedialog(null,"file upload:" + uploadedfile.tostring(),                    "success!", joptionpane.warning_message);            }  

methods have encryption need implemented above

private byte[] getkeybytes(final byte[] key) throws exception {         byte[] keybytes = new byte[16];         system.arraycopy(key, 0, keybytes, 0, math.min(key.length, keybytes.length));         return keybytes;     }      public cipher getcipherencrypt(final byte[] key) throws exception {         byte[] keybytes = getkeybytes(key);         cipher cipher = cipher.getinstance("aes/cbc/pkcs5padding");         secretkeyspec secretkeyspec = new secretkeyspec(keybytes, "aes");         ivparameterspec ivparameterspec = new ivparameterspec(keybytes);         cipher.init(cipher.encrypt_mode, secretkeyspec, ivparameterspec);         return cipher;     } public void encrypt() throws exception {         cipher cipher = getcipherencrypt(key);         fileoutputstream fos = null;         cipheroutputstream cos = null;         fileinputstream fis = null;         try {            fis = new fileinputstream(inputfile);          fos = new fileoutputstream(outputfile);             cos = new cipheroutputstream(fos, cipher);             byte[] data = new byte[1024];             int read = fis.read(data);             while (read != -1) {                 cos.write(data, 0, read);                 read = fis.read(data);                 system.out.println(new string(data, "utf-8").trim());             }             cos.flush();         } {             cos.close();             fos.close();             fis.close();         }     } 

ideas putting these guys together?

first check: make original file zip , upload it

if works make encrypted file zip , send via dropbox