gotosocial/internal/oidc/handlecallback.go

73 lines
2.3 KiB
Go

/*
GoToSocial
Copyright (C) 2021-2023 GoToSocial Authors admin@gotosocial.org
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package oidc
import (
"context"
"errors"
"fmt"
"github.com/superseriousbusiness/gotosocial/internal/gtserror"
"github.com/superseriousbusiness/gotosocial/internal/log"
)
func (i *idp) HandleCallback(ctx context.Context, code string) (*Claims, gtserror.WithCode) {
if code == "" {
err := errors.New("code was empty string")
return nil, gtserror.NewErrorBadRequest(err, err.Error())
}
log.Debug("exchanging code for oauth2token")
oauth2Token, err := i.oauth2Config.Exchange(ctx, code)
if err != nil {
err := fmt.Errorf("error exchanging code for oauth2token: %s", err)
return nil, gtserror.NewErrorInternalError(err)
}
log.Debug("extracting id_token")
rawIDToken, ok := oauth2Token.Extra("id_token").(string)
if !ok {
err := errors.New("no id_token in oauth2token")
return nil, gtserror.NewErrorBadRequest(err, err.Error())
}
log.Debugf("raw id token: %s", rawIDToken)
// Parse and verify ID Token payload.
log.Debug("verifying id_token")
idTokenVerifier := i.provider.Verifier(i.oidcConf)
idToken, err := idTokenVerifier.Verify(ctx, rawIDToken)
if err != nil {
err = fmt.Errorf("could not verify id token: %s", err)
return nil, gtserror.NewErrorUnauthorized(err, err.Error())
}
log.Debug("extracting claims from id_token")
claims := &Claims{}
if err := idToken.Claims(claims); err != nil {
err := fmt.Errorf("could not parse claims from idToken: %s", err)
return nil, gtserror.NewErrorInternalError(err, err.Error())
}
return claims, nil
}
func (i *idp) AuthCodeURL(state string) string {
return i.oauth2Config.AuthCodeURL(state)
}