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fix: verify code challenge of S256

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We do not know for sure, but it is quite likely someone assumed implicit
fallthrough. This meant that if someone used S256 for PKCE, it simply
did not verify the code challenge and always accepted it.

PKCE only started working recently as it was broken for a long time
already, forgejo/forgejo!8678
This commit is contained in:
Gusted 2026-03-02 01:37:10 +01:00 • committed by Mathieu Fenniak
parent df79ccf7d8
commit d1c7b04d09
1 changed files with 1 additions and 2 deletions
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3
routers/web/auth/oauth.go
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@ -480,8 +480,7 @@ func AuthorizeOAuth(ctx *context.Context) {
// pkce support
switch form.CodeChallengeMethod {
case "S256":
case "plain":
case "S256", "plain":
if err := ctx.Session.Set("CodeChallengeMethod", form.CodeChallengeMethod); err != nil {
handleAuthorizeError(ctx, AuthorizeError{
ErrorCode: ErrorCodeServerError,