Hi Christoph
One quick solution I think of is bcrypt then md5 it, worth a try On Wed, Dec 8, 2021 at 6:51 AM Christoph M. Becker <cmbecker69@xxxxxx> wrote:
On 08.12.2021 at 00:11, gordonisnz@xxxxxxxxx wrote:
> I'm looking at the various CRYPT / one-way encryption commands and i
> was wondering if there is a way to create a crypt but restrict output
> to alpha-numeric (a to z, A to Z and 0-9) without the special
> characters ?
>
> Basically ive got a starting reference - numeric over 10,000,000 and
> other numbers and want to do a crypt (or something) but exclude
> special characters from the crypt result.
>
> The best I can think of is to do a crypt (or whatever) etc and then do
> a preg_replace to remove the special characters etc..
>
> The result will be shorter (length), but will be an alpha-numeric crypt.
Yep, it would be shorter, but doing it would be a bad idea. Instead,
*map* the cryptographic value to the desired value. In your case,
bin2hex() would do, but a (variant of) base64_encode() might be
acceptable as well, and could save memory/bandwidth.
I also suggest to read up on that "crypt" thing. :)
--
Christoph M. Becker
