java - Given final block not properly padded(BadPaddingException) -
i using ftpclient java in want encrypt file , decrypt again.
the encryption done using below code:
string s= enumerationsqms.returnstatus.success.getreturnstatus(); int read; ftpconfig objftp = (ftpconfig)gethibernatetemplate().find(" ftpconfig sstatus='a'").get(3); ftpclient ftpclient = new ftpclient(); ftpclient.connect(objftp.getshost(),objftp.getnport()); logger.info("objftp.getsip()"+objftp.getsip()); boolean strue = ftpclient.login(objftp.getsusername(),objftp.getspassword()); logger.info("objftp.getsusername()"+objftp.getsusername()); logger.info("objftp.getspassword()"+objftp.getspassword()); ftpclient.enterlocalpassivemode(); ftpclient.setfiletype(ftp.binary_file_type); if(strue) { string st = generalfunctiondaoimpl.getabsolutepath() + objdbfilestorage.getsfilename(); logger.info("file name--->"+st); file firstlocalfile = new file(st); string uniquefilename =objdbfilestorage.getnfileimageid() + objdbfilestorage.getsfilename(); logger.info("uniquefilename"+uniquefilename); inputstream inputstream = new fileinputstream(st); logger.info("st"+st); outputstream outputstream = ftpclient.storefilestream(uniquefilename); string password = "javapapers"; pbekeyspec keyspec = new pbekeyspec(password.tochararray()); secretkeyfactory keyfactory = secretkeyfactory.getinstance("pbewithmd5andtripledes"); secretkey passwordkey = keyfactory.generatesecret(keyspec); byte[] salt = new byte[8]; random rnd = new random(); rnd.nextbytes(salt); int iterations = 100; pbeparameterspec parameterspec = new pbeparameterspec(salt, iterations); cipher cipher = cipher.getinstance("pbewithmd5andtripledes"); cipher.init(cipher.encrypt_mode, passwordkey, parameterspec); outputstream.write(salt); byte[] input = new byte[64]; while ((read = inputstream.read(input)) != -1) { byte[] output = cipher.update(input, 0, read); if (output != null) outputstream.write(output); } byte[] output = cipher.dofinal(); if (output != null) outputstream.write(output); inputstream.close(); outputstream.flush(); outputstream.close(); if(ftpclient.isconnected()){ ftpclient.logout(); ftpclient.disconnect(); } } return s; but while decryption gives badpaddingexception on code:
string stquery="from ftpconfig sstatus='"+enumerations.masterstatus_add+"'"; list<ftpconfig> lstftp=gethibernatetemplate().find(stquery); ftpclient ftp=new ftpclient(); ftp.connect(lstftp.get(3).getshost(),lstftp.get(3).getnport()); boolean ftpfile=ftp.login(lstftp.get(3).getsusername(), lstftp.get(3).getspassword()); ftp.setfiletype(ftp.binary_file_type); ftp.enterlocalpassivemode(); if(lstdbfile.size()>0) { string filename =nfileimageid+lstdbfile.get(0).getsfilename(); string absolutepath1 = new file("").getabsolutepath() + enumerations.upload_path; string uniquefilename = lstdbfile.get(0).getsfilename(); string st1 = absolutepath1 + uniquefilename; string st2 = absolutepath1 + filename; logger.info("**********ftp storage st1*************"+st1); logger.info("**********ftp storage filename *************"+filename); stresult = uniquefilename; file file = new file(st1); string password = "javapapers"; pbekeyspec pbekeyspec = new pbekeyspec(password.tochararray()); secretkeyfactory secretkeyfactory = secretkeyfactory .getinstance("pbewithmd5andtripledes"); secretkey secretkey = secretkeyfactory.generatesecret(pbekeyspec); inputstream inputstream = ftp.retrievefilestream(filename); outputstream oufil= new fileoutputstream(st2); int c=0; while((c=inputstream.read())!=-1) { oufil.write(c); } oufil.close(); bytearrayinputstream filein = new bytearrayinputstream(oufil.tostring().getbytes()); byte[] salt = new byte[8]; filein.read(salt); pbeparameterspec pbeparameterspec = new pbeparameterspec(salt, 100); cipher cipher = cipher.getinstance("pbewithmd5andtripledes"); cipher.init(cipher.decrypt_mode, secretkey, pbeparameterspec); outputstream outputstream2 = new fileoutputstream(file); long start = system.currenttimemillis(); byte[] bytesarray = new byte[64]; int bytesread = -1; while ((bytesread = filein.read(bytesarray)) != -1) { byte[] output = cipher.update(bytesarray, 0, bytesread); if (output != null) outputstream2.write(output); outputstream2.write(output); } byte[] output = cipher.dofinal(); if (output != null) outputstream2.write(output); boolean download = ftp.completependingcommand(); if (download) { system.out.println("file downloaded !"); logger.info("file downloaded " + (system.currenttimemillis() - start) + "ms"); } else { system.out.println("error in downloading file !"); } outputstream2.flush(); outputstream2.close(); inputstream.close(); i exception on byte[] output = cipher.dofinal();
have @ when decrypting image, gives javax.crypto.badpaddingexception: pad block corrupted android see if helps. bit general, may point in right direction.