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// GoToSocial
// Copyright (C) GoToSocial Authors admin@gotosocial.org
// SPDX-License-Identifier: AGPL-3.0-or-later
//
// 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 fedi
import (
"context"
"errors"
"github.com/superseriousbusiness/gotosocial/internal/db"
"github.com/superseriousbusiness/gotosocial/internal/gtscontext"
"github.com/superseriousbusiness/gotosocial/internal/gtserror"
"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
)
func (p *Processor) authenticate(ctx context.Context, requestedUser string) (
*gtsmodel.Account, // requester: i.e. user making the request
*gtsmodel.Account, // receiver: i.e. the receiving inbox user
gtserror.WithCode,
) {
// First get the requested (receiving) LOCAL account with username from database.
receiver, err := p.state.DB.GetAccountByUsernameDomain(ctx, requestedUser, "")
if err != nil {
if !errors.Is(err, db.ErrNoEntries) {
// Real db error.
err = gtserror.Newf("db error getting account %s: %w", requestedUser, err)
return nil, nil, gtserror.NewErrorInternalError(err)
}
// Account just not found in the db.
return nil, nil, gtserror.NewErrorNotFound(err)
}
var requester *gtsmodel.Account
// Ensure request signed, and use signature URI to
// get requesting account, dereferencing if necessary.
pubKeyAuth, errWithCode := p.federator.AuthenticateFederatedRequest(ctx, requestedUser)
if errWithCode != nil {
return nil, nil, errWithCode
}
if requester = pubKeyAuth.Owner; requester == nil {
requester, _, err = p.federator.GetAccountByURI(
gtscontext.SetFastFail(ctx),
requestedUser,
pubKeyAuth.OwnerURI,
)
if err != nil {
err = gtserror.Newf("error getting account %s: %w", pubKeyAuth.OwnerURI, err)
return nil, nil, gtserror.NewErrorUnauthorized(err)
}
}
if !requester.SuspendedAt.IsZero() {
// Account was marked as suspended by a
// local admin action. Stop request early.
const text = "requesting account is suspended"
return nil, nil, gtserror.NewErrorForbidden(errors.New(text))
}
// Ensure no block exists between requester + requested.
blocked, err := p.state.DB.IsEitherBlocked(ctx, receiver.ID, requester.ID)
if err != nil {
err = gtserror.Newf("db error getting checking block: %w", err)
return nil, nil, gtserror.NewErrorInternalError(err)
} else if blocked {
err = gtserror.Newf("block exists between accounts %s and %s", requester.ID, receiver.ID)
return nil, nil, gtserror.NewErrorForbidden(err)
}
return requester, receiver, nil
}
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