330 lines
10 KiB
Go
330 lines
10 KiB
Go
// GoToSocial
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// Copyright (C) GoToSocial Authors admin@gotosocial.org
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// SPDX-License-Identifier: AGPL-3.0-or-later
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package account
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import (
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"context"
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"errors"
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"fmt"
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"net/url"
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"slices"
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"time"
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"github.com/superseriousbusiness/gotosocial/internal/ap"
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apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
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"github.com/superseriousbusiness/gotosocial/internal/federation/dereferencing"
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"github.com/superseriousbusiness/gotosocial/internal/gtserror"
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"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
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"github.com/superseriousbusiness/gotosocial/internal/id"
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"github.com/superseriousbusiness/gotosocial/internal/messages"
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"github.com/superseriousbusiness/gotosocial/internal/oauth"
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"github.com/superseriousbusiness/gotosocial/internal/uris"
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"golang.org/x/crypto/bcrypt"
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)
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func (p *Processor) MoveSelf(
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ctx context.Context,
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authed *oauth.Auth,
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form *apimodel.AccountMoveRequest,
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) gtserror.WithCode {
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// Ensure valid MovedToURI.
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if form.MovedToURI == "" {
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err := errors.New("no moved_to_uri provided in account Move request")
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return gtserror.NewErrorBadRequest(err, err.Error())
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}
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targetAcctURIStr := form.MovedToURI
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targetAcctURI, err := url.Parse(form.MovedToURI)
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if err != nil {
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err := fmt.Errorf("invalid moved_to_uri provided in account Move request: %w", err)
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return gtserror.NewErrorBadRequest(err, err.Error())
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}
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if targetAcctURI.Scheme != "https" && targetAcctURI.Scheme != "http" {
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err := errors.New("invalid moved_to_uri provided in account Move request: uri scheme must be http or https")
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return gtserror.NewErrorBadRequest(err, err.Error())
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}
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// Self account Move requires password to ensure it's for real.
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if form.Password == "" {
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err := errors.New("no password provided in account Move request")
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return gtserror.NewErrorBadRequest(err, err.Error())
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}
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if err := bcrypt.CompareHashAndPassword(
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[]byte(authed.User.EncryptedPassword),
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[]byte(form.Password),
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); err != nil {
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err := errors.New("invalid password provided in account Move request")
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return gtserror.NewErrorBadRequest(err, err.Error())
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}
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// We can't/won't validate Move activities
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// to domains we have blocked, so check this.
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targetDomainBlocked, err := p.state.DB.IsDomainBlocked(ctx, targetAcctURI.Host)
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if err != nil {
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err := fmt.Errorf(
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"db error checking if target domain %s blocked: %w",
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targetAcctURI.Host, err,
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)
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return gtserror.NewErrorInternalError(err)
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}
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if targetDomainBlocked {
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err := fmt.Errorf(
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"domain of %s is blocked from this instance; "+
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"you will not be able to Move to that account",
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targetAcctURIStr,
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)
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return gtserror.NewErrorUnprocessableEntity(err, err.Error())
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}
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var (
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// Current account from which
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// the move is taking place.
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originAcct = authed.Account
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// Target account to which
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// the move is taking place.
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targetAcct *gtsmodel.Account
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// AP representation of target.
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targetAcctable ap.Accountable
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)
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// Next steps involve checking + setting
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// state that might get messed up if a
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// client triggers this function twice
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// in quick succession, so get a lock on
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// this account.
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lockKey := originAcct.URI
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unlock := p.state.ClientLocks.Lock(lockKey)
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defer unlock()
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// Ensure we have a valid, up-to-date representation of the target account.
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targetAcct, targetAcctable, err = p.federator.GetAccountByURI(
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ctx,
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originAcct.Username,
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targetAcctURI,
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)
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if err != nil {
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err := fmt.Errorf("error dereferencing moved_to_uri account: %w", err)
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return gtserror.NewErrorUnprocessableEntity(err, err.Error())
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}
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if !targetAcct.SuspendedAt.IsZero() {
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err := fmt.Errorf(
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"target account %s is suspended from this instance; "+
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"you will not be able to Move to that account",
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targetAcct.URI,
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)
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return gtserror.NewErrorUnprocessableEntity(err, err.Error())
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}
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if targetAcct.IsRemote() {
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// Force refresh Move target account
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// to ensure we have up-to-date version.
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targetAcct, _, err = p.federator.RefreshAccount(ctx,
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originAcct.Username,
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targetAcct,
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targetAcctable,
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dereferencing.Freshest,
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)
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if err != nil {
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err := fmt.Errorf(
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"error refreshing target account %s: %w",
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targetAcctURIStr, err,
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)
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return gtserror.NewErrorUnprocessableEntity(err, err.Error())
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}
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}
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// If originAcct has already moved, ensure
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// this move reattempt is to the same account.
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if originAcct.IsMoving() &&
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originAcct.MovedToURI != targetAcct.URI {
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err := fmt.Errorf(
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"your account is already Moving or has Moved to %s; you cannot also Move to %s",
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originAcct.MovedToURI, targetAcct.URI,
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)
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return gtserror.NewErrorUnprocessableEntity(err, err.Error())
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}
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// Target account MUST be aliased to this
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// account for this to be a valid Move.
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if !slices.Contains(targetAcct.AlsoKnownAsURIs, originAcct.URI) {
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err := fmt.Errorf(
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"target account %s is not aliased to this account via alsoKnownAs; "+
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"if you just changed it, please wait a few minutes and try the Move again",
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targetAcct.URI,
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)
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return gtserror.NewErrorUnprocessableEntity(err, err.Error())
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}
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// Target account cannot itself have
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// already Moved somewhere else.
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if targetAcct.MovedToURI != "" {
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err := fmt.Errorf(
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"target account %s has already Moved somewhere else (%s); "+
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"you will not be able to Move to that account",
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targetAcct.URI, targetAcct.MovedToURI,
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)
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return gtserror.NewErrorUnprocessableEntity(err, err.Error())
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}
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// If a Move has been *attempted* within last 5m,
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// that involved the origin and target in any way,
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// then we shouldn't try to reprocess immediately.
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latestMoveAttempt, err := p.state.DB.GetLatestMoveAttemptInvolvingURIs(
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ctx, originAcct.URI, targetAcct.URI,
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)
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if err != nil {
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err := fmt.Errorf(
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"error checking latest Move attempt involving origin %s and target %s: %w",
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originAcct.URI, targetAcct.URI, err,
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)
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return gtserror.NewErrorInternalError(err)
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}
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if !latestMoveAttempt.IsZero() &&
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time.Since(latestMoveAttempt) < 5*time.Minute {
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err := fmt.Errorf(
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"your account or target account have been involved in a Move attempt within "+
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"the last 5 minutes, will not process Move; please try again after %s",
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latestMoveAttempt.Add(5*time.Minute),
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)
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return gtserror.NewErrorUnprocessableEntity(err, err.Error())
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}
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// If a Move has *succeeded* within the last week
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// that involved the origin and target in any way,
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// then we shouldn't process again for a while.
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latestMoveSuccess, err := p.state.DB.GetLatestMoveSuccessInvolvingURIs(
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ctx, originAcct.URI, targetAcct.URI,
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)
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if err != nil {
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err := fmt.Errorf(
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"error checking latest Move success involving origin %s and target %s: %w",
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originAcct.URI, targetAcct.URI, err,
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)
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return gtserror.NewErrorInternalError(err)
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}
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if !latestMoveSuccess.IsZero() &&
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time.Since(latestMoveSuccess) < 168*time.Hour {
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err := fmt.Errorf(
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"your account or target account have been involved in a successful Move within "+
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"the last 7 days, will not process Move; please try again after %s",
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latestMoveSuccess.Add(168*time.Hour),
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)
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return gtserror.NewErrorUnprocessableEntity(err, err.Error())
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}
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// See if we have a Move stored already
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// or if we need to create a new one.
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var move *gtsmodel.Move
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if originAcct.MoveID != "" {
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// Move already stored, ensure it's
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// to the target and nothing weird is
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// happening with race conditions etc.
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move = originAcct.Move
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if move == nil {
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// This shouldn't happen...
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err := fmt.Errorf("nil move for id %s", originAcct.MoveID)
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return gtserror.NewErrorInternalError(err)
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}
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if move.OriginURI != originAcct.URI ||
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move.TargetURI != targetAcct.URI {
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// This is also weird...
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err := errors.New("a Move is already stored for your account but contains invalid fields")
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return gtserror.NewErrorUnprocessableEntity(err, err.Error())
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}
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if originAcct.MovedToURI != move.TargetURI {
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// Huh... I'll be damned.
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err := errors.New("stored Move target URI does not equal your moved_to_uri value")
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return gtserror.NewErrorUnprocessableEntity(err, err.Error())
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}
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} else {
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// Move not stored yet, create it.
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moveID := id.NewULID()
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moveURIStr := uris.GenerateURIForMove(originAcct.Username, moveID)
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// We might have selected the target
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// using the URL and not the URI.
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// Ensure we continue with the URI!
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if targetAcctURIStr != targetAcct.URI {
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targetAcctURIStr = targetAcct.URI
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targetAcctURI, err = url.Parse(targetAcctURIStr)
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if err != nil {
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return gtserror.NewErrorInternalError(err)
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}
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}
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// Parse origin URI.
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originAcctURI, err := url.Parse(originAcct.URI)
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if err != nil {
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return gtserror.NewErrorInternalError(err)
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}
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// Store the Move.
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move = >smodel.Move{
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ID: moveID,
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AttemptedAt: time.Now(),
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OriginURI: originAcct.URI,
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Origin: originAcctURI,
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TargetURI: targetAcctURIStr,
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Target: targetAcctURI,
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URI: moveURIStr,
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}
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if err := p.state.DB.PutMove(ctx, move); err != nil {
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err := fmt.Errorf("db error storing move %s: %w", moveURIStr, err)
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return gtserror.NewErrorInternalError(err)
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}
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// Update account with the new
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// Move, and set moved_to_uri.
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originAcct.MoveID = move.ID
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originAcct.Move = move
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originAcct.MovedToURI = targetAcct.URI
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originAcct.MovedTo = targetAcct
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if err := p.state.DB.UpdateAccount(
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ctx,
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originAcct,
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"move_id",
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"moved_to_uri",
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); err != nil {
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err := fmt.Errorf("db error updating account: %w", err)
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return gtserror.NewErrorInternalError(err)
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}
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}
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// Everything seems OK, process Move side effects async.
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p.state.Workers.EnqueueClientAPI(ctx, messages.FromClientAPI{
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APObjectType: ap.ActorPerson,
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APActivityType: ap.ActivityMove,
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GTSModel: move,
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OriginAccount: originAcct,
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TargetAccount: targetAcct,
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})
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return nil
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}
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