Help with Invalid code_challenge_method

Questions
#1

I would like to know the possibilities of receiving this error
Invalid code_challenge_method

i was checking the code and it looks like when it doesn’t find the hash code used , it throws the error
if (methods.indexOf(tokenParams.codeChallengeMethod) === -1) {
throw new AuthSdkError(‘Invalid code_challenge_method’);
}

But am not sure, can anyone confirm please

#2

Take a look here:

https://developer.okta.com/docs/guides/implement-grant-type/authcodepkce/main/#request-an-authorization-code

code_challenge_method should be S256. Any chance you’re trying to hash with a different algorithm?

EDIT: fixed link

#3

Don’t think so. Can the hash algorithm be customized?
Will that error only come when hash used is different?

#4

I’m not sure to be honest. Can you check your network tab and paste the query parameters of your /authorize call?

#5

This was just one time error that i got, but after that i was not able to replicate.
So don’t really have query parameters. thank you

#6

Is it possible that earlier it was using different hash algorithm and now recently it changed to S256 or it was always S256?

#7

Code challenge parameter if PKCE flow has to be initiated. code_challenge_method . Optional. The default value is plain. The value can be plain or S256.

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