Re: Encryption

If nobody has a better suggestion I am simply going to do a reverse check and for those that fail implement a massive hack. I really don't want to do that... Please, if you have any ideas give me a yell? D "Darren Wheatley" <dw_spam@iinet.net.au> wrote in message news:20041221035703.67282.qmail@pb1.pair.com... > Hey all. > > I am trying to get encryption working for my site. > > I have found some code and set up a test bed for it, but it fails to return > the same value after the 26th item. I was hoping someone could take a look > and maybe tell me why? There is very little help out there for encryption. > If you know of a working example/tutorial, can you please reply with a link? > > Many thanks, > > Darren > > <? > global $arrAlphaVals; > global $intTot; > > $intTot = 5000; > $arrAlphaVals = array(); > > function init() > { > global $arrAlphaVals; > global $intTot; > for ($i=0;$i<$intTot;$i++) > { > $arrAlphaVals[$i] = sprintf("%016s", strtoupper(dechex($i))); > } > return $arrAlphaVals; > } > function main() > { > global $arrAlphaVals; > global $intTot; > init(); > > $arrError = array(); > echo "Encryption test<br>\n"; > for ($i=0;$i<$intTot;$i++) > { > if ($i%1000 == 0) > { > echo $i."<br>"; > flush(); > } > $strInit = $arrAlphaVals[$i]; > $strEncVal = encryptIt($strInit); > $strOut = decryptIt($strEncVal); > //echo "In: ".$strInit.", Enc: ".$strEncVal.", Out: > ".$strOut."<br>"; > if ($strOut != $strInit) > { > $strError .= "Failed on: ".$i."<br>\n"; > $arrError[$strInit] = $strOut; > } > } > if (sizeof($arrError) > 0) > { > // There were errors > foreach ($arrError as $strKey => $strVal) > { > echo "Input: '".$strKey."' failed with result > '".$strVal."'<br>\n"; > } > echo "<hr>".$strError; > } > echo "<hr>Tested ".$i." cases. Done.<br>\n"; > } > function encryptIt($strIn) > { > $key = "biteme"; > $strRet = _mencrypt($strIn, $key); > return $strRet; > } > function decryptIt($strIn) > { > $key = "biteme"; > $strRet = _mdecrypt($strIn, $key); > return $strRet; > } > function _mencrypt($input,$key) > { > $input = str_replace("\n","",$input); > $input = str_replace("\t","",$input); > $input = str_replace("\r","",$input); > $key = substr(md5($key),0,24); > $td = mcrypt_module_open ('tripledes', '', 'ecb', > ''); > $iv = mcrypt_create_iv (mcrypt_enc_get_iv_size ($td), MCRYPT_RAND); > mcrypt_generic_init ($td, $key, $iv); > $encrypted_data = mcrypt_generic ($td, $input); > mcrypt_generic_deinit ($td); > mcrypt_module_close ($td); > return trim(chop(base64_encode($encrypted_data))); > } > > //$input - stuff to decrypt > //$key - the secret key to use > > function _mdecrypt($input,$key) > { > $input = str_replace("\n","",$input); > $input = str_replace("\t","",$input); > $input = str_replace("\r","",$input); > $input = trim(chop(base64_decode($input))); > $td = mcrypt_module_open ('tripledes', '', 'ecb', > ''); > $key = substr(md5($key),0,24); > $iv = mcrypt_create_iv (mcrypt_enc_get_iv_size ($td), MCRYPT_RAND); > mcrypt_generic_init ($td, $key, $iv); > $decrypted_data = mdecrypt_generic ($td, $input); > mcrypt_generic_deinit ($td); > mcrypt_module_close ($td); > return trim(chop($decrypted_data)); > } > main(); > ?> > > The original encryption and decryption code came from Jeremy Stansfield > (http://www.weberdev.com/get_example-3752.html) > > Thanks again!