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DB_escape_string
03-26-2014, 08:01 PM, (This post was last modified: 03-26-2014, 08:09 PM by icedlava.)
#65
RE: DB_escape_string
(03-26-2014, 07:38 PM)serakfalcon Wrote: If the SQL string is constant like what Tim posted you don't need the overhead of a parametrized query, which is the point Tim was making I think.
If Tim is a variable and it is possible for the user to change the charset of the DB, it is possible but very difficult to write an injection.

Correct, I'd missed the 'constant' and was thinking of variables. However variables is what we have been talking of, and SQL injection protection, just one security issue we are trying to guard against, is possible with any variable although more so in some situations than others.

What it boils down to, is we could debate the issue for weeks as it happens in the lists.

We could look at other opensource projects etc drupal, wordpress, joomla, codeigniter that use one or other of the following (or a few):

1. PDO
2. Parameterized input in queries - using bound variables
3. Parameterized input in queries - using escaped variables where the escape function is context aware at least for string and integer

I've committed the code that contained bind vars as per request on this thread.

I used an adjustment to the existing DB_query as requested and as such needs to make provision for both existing parametrized and non-parametrized query input types (Personally not keen on that - prefer to use a totally new one with neater signature and code, and have them concurrent so the code still works until they are all updated).

If we want to use an escape function instead of bind vars, then that is fine by me as long as all things are considered, but everything seemed to have been eliminated except the bind var method which I was requested to commit.

We had I thought already also eliminated PDO - or is that also still in the running too?

The changes recently committed to the DB_query function replacing the one I originally put in the new branch, will not work to circumvent bad data and security issues (but I might have overlooked something).

Cheers,





PS. I am happy to help with the code refactor, but I don't have time to debate the pros and cons of every method as this is found in many threads and documents all over the web already debated vigourously - people have their favourites. I think one of the standard methods (list them such as the 3 in my last post) that are well documented, that have well documented code examples and that best fit with webERP objectives or can easily be modified for it, should be chosen- then go for it. No need to reinvent the wheel.

Cheers,
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Messages In This Thread
DB_escape_string - by icedlava - 03-06-2014, 05:42 PM
RE: DB_escape_string - by serakfalcon - 03-06-2014, 06:26 PM
RE: DB_escape_string - by Forums - 03-06-2014, 06:26 PM
RE: DB_escape_string - by icedlava - 03-09-2014, 10:19 PM
RE: DB_escape_string - by Forums - 03-10-2014, 04:44 AM
RE: DB_escape_string - by icedlava - 03-10-2014, 10:31 AM
RE: DB_escape_string - by serakfalcon - 03-10-2014, 04:16 PM
RE: DB_escape_string - by icedlava - 03-10-2014, 04:38 PM
RE: DB_escape_string - by serakfalcon - 03-06-2014, 06:27 PM
RE: DB_escape_string - by Forums - 03-10-2014, 06:56 PM
RE: DB_escape_string - by icedlava - 03-10-2014, 07:13 PM
RE: DB_escape_string - by Forums - 03-10-2014, 10:52 PM
RE: DB_escape_string - by Forums - 03-11-2014, 05:03 AM
RE: DB_escape_string - by serakfalcon - 03-11-2014, 01:26 PM
RE: DB_escape_string - by Forums - 03-11-2014, 05:43 PM
RE: DB_escape_string - by weberp - 03-14-2014, 08:25 PM
RE: DB_escape_string - by icedlava - 03-14-2014, 08:33 PM
RE: DB_escape_string - by weberp - 03-14-2014, 09:02 PM
RE: DB_escape_string - by phil - 03-12-2014, 02:59 PM
RE: DB_escape_string - by icedlava - 03-12-2014, 03:39 PM
RE: DB_escape_string - by Forums - 03-12-2014, 08:20 PM
RE: DB_escape_string - by serakfalcon - 03-12-2014, 09:01 PM
RE: DB_escape_string - by icedlava - 03-12-2014, 09:08 PM
RE: DB_escape_string - by serakfalcon - 03-13-2014, 12:39 AM
RE: DB_escape_string - by icedlava - 03-13-2014, 11:55 AM
RE: DB_escape_string - by phil - 03-13-2014, 12:49 PM
RE: DB_escape_string - by icedlava - 03-13-2014, 01:03 PM
RE: DB_escape_string - by phil - 03-13-2014, 05:27 PM
RE: DB_escape_string - by icedlava - 03-13-2014, 05:52 PM
RE: DB_escape_string - by phil - 03-13-2014, 06:01 PM
RE: DB_escape_string - by icedlava - 03-13-2014, 06:39 PM
RE: DB_escape_string - by weberp - 03-16-2014, 03:19 AM
RE: DB_escape_string - by serakfalcon - 03-20-2014, 08:31 PM
RE: DB_escape_string - by weberp1 - 03-21-2014, 12:04 AM
RE: DB_escape_string - by serakfalcon - 03-21-2014, 01:50 AM
RE: DB_escape_string - by icedlava - 03-20-2014, 10:29 PM
RE: DB_escape_string - by serakfalcon - 03-20-2014, 11:48 PM
RE: DB_escape_string - by icedlava - 03-21-2014, 11:04 AM
RE: DB_escape_string - by icedlava - 03-21-2014, 01:08 PM
RE: DB_escape_string - by serakfalcon - 03-21-2014, 04:51 PM
RE: DB_escape_string - by icedlava - 03-21-2014, 05:48 PM
RE: DB_escape_string - by serakfalcon - 03-21-2014, 06:54 PM
RE: DB_escape_string - by icedlava - 03-22-2014, 12:31 AM
RE: DB_escape_string - by serakfalcon - 03-22-2014, 12:55 AM
RE: DB_escape_string - by phil - 03-22-2014, 03:20 PM
RE: DB_escape_string - by serakfalcon - 03-22-2014, 04:28 PM
RE: DB_escape_string - by phil - 03-23-2014, 09:00 AM
RE: DB_escape_string - by Uhuru - 03-23-2014, 08:27 PM
RE: DB_escape_string - by icedlava - 03-26-2014, 03:22 AM
RE: DB_escape_string - by serakfalcon - 03-23-2014, 06:35 PM
RE: DB_escape_string - by Uhuru - 03-26-2014, 08:05 AM
RE: DB_escape_string - by icedlava - 03-26-2014, 12:51 PM
RE: DB_escape_string - by phil - 03-26-2014, 01:40 PM
RE: DB_escape_string - by icedlava - 03-26-2014, 01:57 PM
RE: DB_escape_string - by Uhuru - 03-26-2014, 05:30 PM
RE: DB_escape_string - by icedlava - 03-26-2014, 06:04 PM
RE: DB_escape_string - by serakfalcon - 03-26-2014, 06:20 PM
RE: DB_escape_string - by icedlava - 03-26-2014, 06:27 PM
RE: DB_escape_string - by Uhuru - 03-26-2014, 06:42 PM
RE: DB_escape_string - by icedlava - 03-26-2014, 06:46 PM
RE: DB_escape_string - by Uhuru - 03-26-2014, 06:34 PM
RE: DB_escape_string - by serakfalcon - 03-26-2014, 06:40 PM
RE: DB_escape_string - by icedlava - 03-26-2014, 06:41 PM
RE: DB_escape_string - by serakfalcon - 03-26-2014, 07:38 PM
RE: DB_escape_string - by icedlava - 03-26-2014, 08:01 PM
RE: DB_escape_string - by phil - 03-27-2014, 07:24 AM
RE: DB_escape_string - by icedlava - 03-27-2014, 11:56 AM
RE: DB_escape_string - by serakfalcon - 03-27-2014, 01:11 PM
RE: DB_escape_string - by icedlava - 03-27-2014, 01:39 PM
RE: DB_escape_string - by serakfalcon - 03-27-2014, 03:32 PM
RE: DB_escape_string - by icedlava - 03-27-2014, 03:38 PM
RE: DB_escape_string - by Exsonqu_Qu - 03-27-2014, 06:00 PM
RE: DB_escape_string - by Uhuru - 03-27-2014, 06:50 PM
RE: DB_escape_string - by Exsonqu_Qu - 03-28-2014, 12:26 PM
RE: DB_escape_string - by phil - 03-27-2014, 06:57 PM
RE: DB_escape_string - by icedlava - 03-27-2014, 09:06 PM
RE: DB_escape_string - by Uhuru - 03-27-2014, 09:14 PM
RE: DB_escape_string - by icedlava - 03-27-2014, 09:21 PM
RE: DB_escape_string - by Exsonqu_Qu - 03-28-2014, 12:44 PM
RE: DB_escape_string - by Uhuru - 03-27-2014, 10:48 PM
RE: DB_escape_string - by icedlava - 03-27-2014, 10:55 PM
RE: DB_escape_string - by Uhuru - 03-27-2014, 11:44 PM
RE: DB_escape_string - by icedlava - 03-27-2014, 11:55 PM
RE: DB_escape_string - by agaluski - 03-27-2014, 11:53 PM
RE: DB_escape_string - by serakfalcon - 03-28-2014, 01:31 PM
RE: DB_escape_string - by icedlava - 03-28-2014, 03:34 PM
RE: DB_escape_string - by Uhuru - 03-28-2014, 07:33 PM
RE: DB_escape_string - by phil - 03-28-2014, 08:05 PM
RE: DB_escape_string - by Uhuru - 03-31-2014, 04:27 PM
RE: DB_escape_string - by serakfalcon - 03-31-2014, 05:47 PM

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