Random string generator

AusMarkB

I had a quick scan through the utilities and didn't see one but thought I'd throw it out there in case I've missed it.
In your little bag of tricks do you have a function that can create a random string of a given length and ideally with some input over which characters can be used?

I could write one, but I've done that sort of thing before, only to stumble over your better version later.

KevinFournier

No, we haven't done anything like this. Nothing to stumble upon here. Would this be for a password generator or something?

AusMarkB

Code verifier for Xero API's

Generating a code verifier and code challenge
The first thing your app must do before starting an authorization request is generate a “code verifier”. A code verifier is a random string between 43 and 128 characters long that consists of the characters A-Z, a-z, 0-9, and the punctuation -._~ (hyphen, period, underscore, and tilde).

The “code challenge” is created by performing a SHA256 hash on the code verifier and then Base64url encoding the hash

I know you've got the hash and the encoding; I just need to generate the string to hash and encode.

AusMarkB

Hhhmmmm, I forgot that I've already got something that probably fits the bill with a couple of tweaks.
Don't mind me. Nothing to see here.