PKCE with OIDC Connector

[titlisgupta]

I am trying to use Authorization code flow with PKCE in DEX, with oidc connector. I have created a public client in dex and my oidc provider(keycloak) is configured to use PKCE but my authentication is failing with error Failed to authenticate: invalid_request: Missing parameter: code_challenge_method
The client application is sending the code_challenge_method correctly, it even works if I connect it directly with keycloak.
http://172.24.128.115:32764/auth/testUI?client_id=testUI&code_challenge=kN7BfqrX9AkKfqUQIdXuffOnTlWY3lsgRm_90IVZeg4&code_challenge_method=S256&redirect_uri=http%3A%2F%2Flocalhost%3A15000%2Fcode-identityserver-sample.html&response_mode=query&response_type=code&scope=openid+profile&state=52b27ac792b84d83bcc0909312aecd43

However DEX is not adding the code_challenge_method while forwarding the request to keycloak.
GET /auth/realms/master/protocol/openid-connect/auth?client_id=testUI&redirect_uri=http%3A%2F%2F172.24.128.115%3A32764%2Fcallback&response_type=code&scope=openid+profile+email+openid&state=c2j5scpzyjzgmbjoiypktn2du

I would like to understand if there is any more configuration we need to do to enable PKCE in DEX. My configuration is as follow

[vixus0]

A few years late, but I have raised a PR for this feature here: #3188

[ClaudioNTT]

Hello, any news?

[michaelajr]

Can not believe this is not doable.

[johnvan7]

I've tested the PR #3188 and it works as expected