SQLlite Database Encryption Question

Question

hello all, I'm developing Air Application using flex, I need to encrypt the database file. It is said that an encrytion key of exaclty 16 byte is needed...At the Start the user is given the option of either using an existing encryppted sql database or creating a new encrypted one. please how do i make sure a string is converted to a ByteArray with length of exaclty 16 byte....any form of explaination or sample code would help
Thanks

Answer 1

Sorry, the string that you pass to it must be conformed correctly.  If it isn't, it will throw this error message:
ArgumentError: The password must be a strong password. It must be 8-32 characters long. It must contain at least one uppercase letter, at least one lowercase letter, and at least one number or symbol.
Currently I am using the method below to generate a password.  I haven't had any issues with it not generating a password that isn't conformed correctly for the getEncryptionKey().  But you can easily edit it, for that it *will* contain "...at least one uppercase letter, at least one lowercase letter, and at least one number or symbol."
public static function generateRandomPassword(strHash:String = 'acbdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890!@#$%^&*',lnHash:Number = 32):String
     var i:Number = 1;
     var hash:String = "";
     var nLenght:Number = strHash.length;
     while (i <= lnHash)
          var num:Number = Math.floor(Math.random()*nLenght)+1;
          hash += strHash.charAt(num);
          i++;
     return hash;
But also keep in mind, that this key will be stored in the ELS directory of the user's machine.  So it is protected by the OS by a certain degree.