use existing oauth grant for public client (#31015) (#31042)

Backport #31015 by @denyskon

Do not try to create a new authorization grant when one exists already,
thus preventing a DB-related authorization issue.

Fix https://github.com/go-gitea/gitea/pull/30790#issuecomment-2118812426

Co-authored-by: Denys Konovalov <kontakt@denyskon.de>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
This commit is contained in:
Giteabot 2024-05-22 01:32:31 +08:00 committed by GitHub
parent 27a4c67992
commit e3390e2441
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1 changed files with 17 additions and 2 deletions

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@ -556,7 +556,13 @@ func GrantApplicationOAuth(ctx *context.Context) {
ctx.ServerError("GetOAuth2ApplicationByClientID", err)
return
}
grant, err := app.CreateGrant(ctx, ctx.Doer.ID, form.Scope)
grant, err := app.GetGrantByUserID(ctx, ctx.Doer.ID)
if err != nil {
handleServerError(ctx, form.State, form.RedirectURI)
return
}
if grant == nil {
grant, err = app.CreateGrant(ctx, ctx.Doer.ID, form.Scope)
if err != nil {
handleAuthorizeError(ctx, AuthorizeError{
State: form.State,
@ -565,6 +571,15 @@ func GrantApplicationOAuth(ctx *context.Context) {
}, form.RedirectURI)
return
}
} else if grant.Scope != form.Scope {
handleAuthorizeError(ctx, AuthorizeError{
State: form.State,
ErrorDescription: "a grant exists with different scope",
ErrorCode: ErrorCodeServerError,
}, form.RedirectURI)
return
}
if len(form.Nonce) > 0 {
err := grant.SetNonce(ctx, form.Nonce)
if err != nil {