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OAuth2 PKCE and client secret #11088

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opened 2025-11-02 09:27:16 -06:00 by GiteaMirror · 2 comments
GiteaMirror commented 2025-11-02 09:27:16 -06:00
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Originally created by @acquleo on GitHub (Jun 23, 2023).

Description

I'm trying to use OAuth2 provider using PKCE.
The client I'm using is generating a code_challenge to use PKCE instead of the client secret.

"https://server:6443/login/oauth/authorize?response_type=code&state=FZTFQLkJnDLfuUKNWwfBCA&code_challenge=U6s7WQpA0soQBrhWSf3_FqQuDCw7aZ4TNd53lfX8-Is&code_challenge_method=S256&client_id=26b39a6d-fb09-417b-aa59-9d9866290983&scope=package&redirect_uri=https%3A%2F%2F127.0.0.1%3A5014%2Fauthentication%2Flogin-callback"

the problem is that gitea returns the following response:
"https://127.0.0.1:5014/authentication/login-callback?code=gta_63q4l4vexpx2e5zmajgv7znj2wc5bsk2nc3fswjb76j3gsvwehxq&state=FZTFQLkJnDLfuUKNWwfBCA"

containing the following error:
ValueKind = Object : "{"error":"unauthorized_client","error_description":"invalid client secret"}"

if I configure the client secret it works.

Is it possible that there is a problem into gitea PKCE management?

Gitea Version

1.19.3

Can you reproduce the bug on the Gitea demo site?

No

Log Gist

No response

Screenshots

No response

Git Version

No response

Operating System

Ubuntu 22.04.2 LTS

How are you running Gitea?

I'm running GITEA as stack on docker swarm node.
image: gitea/gitea:1.19.3
image: postgres:11-alpine

Database

PostgreSQL

Originally created by @acquleo on GitHub (Jun 23, 2023). ### Description I'm trying to use OAuth2 provider using PKCE. The client I'm using is generating a code_challenge to use PKCE instead of the client secret. "https://server:6443/login/oauth/authorize?response_type=code&state=FZTFQLkJnDLfuUKNWwfBCA&code_challenge=U6s7WQpA0soQBrhWSf3_FqQuDCw7aZ4TNd53lfX8-Is&code_challenge_method=S256&client_id=26b39a6d-fb09-417b-aa59-9d9866290983&scope=package&redirect_uri=https%3A%2F%2F127.0.0.1%3A5014%2Fauthentication%2Flogin-callback" the problem is that gitea returns the following response: "https://127.0.0.1:5014/authentication/login-callback?code=gta_63q4l4vexpx2e5zmajgv7znj2wc5bsk2nc3fswjb76j3gsvwehxq&state=FZTFQLkJnDLfuUKNWwfBCA" containing the following error: ValueKind = Object : "{"error":"unauthorized_client","error_description":"invalid client secret"}" if I configure the client secret it works. Is it possible that there is a problem into gitea PKCE management? ### Gitea Version 1.19.3 ### Can you reproduce the bug on the Gitea demo site? No ### Log Gist _No response_ ### Screenshots _No response_ ### Git Version _No response_ ### Operating System Ubuntu 22.04.2 LTS ### How are you running Gitea? I'm running GITEA as stack on docker swarm node. image: gitea/gitea:1.19.3 image: postgres:11-alpine ### Database PostgreSQL
GiteaMirror added the type/bug label 2025-11-02 09:27:16 -06:00
GiteaMirror commented 2025-11-02 09:27:17 -06:00
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@acquleo commented on GitHub (Jun 23, 2023):

it looks like is this related to #25033?

@acquleo commented on GitHub (Jun 23, 2023): it looks like is this related to #25033?
GiteaMirror commented 2025-11-02 09:27:17 -06:00
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@acquleo commented on GitHub (Jun 23, 2023):

tried gitea 1.20.0-rc-1 successfully

@acquleo commented on GitHub (Jun 23, 2023): tried gitea 1.20.0-rc-1 successfully
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Reference: github-starred/gitea#11088
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