Product Code

[Brianfree]

Hi, i have a php page which displays the following...

Product_Group_ID (2 Digits)
Reference Number (6 Digits)
Price

An example...

01
096544
12.50

I want to turn this information in to a unique secret product code that the average person couldn't decode and that i can put into my 3of 9 barcode to then decode into the right fields in access 2007 once scanned in???

Please can anyone advise???

Many thanks,

Brian

 

[jpadie]

sure.

try this

<?php
class encrypter{
	
	public function __construct(){
		$iv_size = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB);
		$this->iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);
		$this->cypher = MCRYPT_RIJNDAEL_256;
		$this->mode = MCRYPT_MODE_ECB;
		$this->key = 'i am a very secret key';
	}
	public function encrypt($productID, $ref, $price){
		$data = serialize(array($productID, $ref, $price));
		$crypttext = mcrypt_encrypt($this->cypher, $this->key, $data, $this->mode, $this->iv);
    	return $crypttext;
	}
	
	public function decrypt($string){
		 $result = mcrypt_decrypt ( $this->cypher , $this->key , $string , $this->mode, $this->iv );
		 return unserialize($result);
	}
}

$encrypter = new encrypter;
$encryptedString = $encrypter->encrypt('productID', 'Reference', 'PRICE');
echo 'My encryption looks like this ' . $encryptedString;
echo '<br/>The Data, once decryped, looks like this: <pre>' . print_r($encrypter->decrypt($encryptedString), true) .  '</pre>';
?>

 

[ingresman]

is 3of9 still limited to 8 characters ? (might be totaly wrong on that, it's been a while since i did barcodes)

 

[jpadie]

good question. i took the question simply to be about encryption, knowing nothing about barcodes myself.

if barcodes are limited to certain trivial data sets or character sets then the OP might be better served by generating a unique value that corresponds to the barcode specification and then storing that unique value with the the data (s)he wishes to 'encrypt'. the data would then be totally hidden in that it is meaningless to anyone that does not have access to the OP's lookup tables.