On 07/12/2021 23:11, gordonisnz@xxxxxxxxx wrote:
Hello.
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.
--
Gordon.
If you only want it limited to the 36 characters, you could base64
encode it after it's encrypted? This will increase the size of the
encrypted data, but not knowing what you're doing, it would be
impossible to say whether or not this is a problem for you.
I'd advise against removing characters from the encrypted string though,
as this effectively increases the chance for collisions.
--
Ashley Sheridan
https://www.ashleysheridan.co.uk
