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/*
GoToSocial
Copyright (C) 2021 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 message
import (
"context"
"fmt"
"net/http"
"github.com/go-fed/activity/streams"
apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
"github.com/superseriousbusiness/gotosocial/internal/db"
"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
"github.com/superseriousbusiness/gotosocial/internal/util"
)
// authenticateAndDereferenceFediRequest authenticates the HTTP signature of an incoming federation request, using the given
// username to perform the validation. It will *also* dereference the originator of the request and return it as a gtsmodel account
// for further processing. NOTE that this function will have the side effect of putting the dereferenced account into the database,
// and passing it into the processor through a channel for further asynchronous processing.
func (p *processor) authenticateAndDereferenceFediRequest(username string, r *http.Request) (*gtsmodel.Account, error) {
// first authenticate
requestingAccountURI, err := p.federator.AuthenticateFederatedRequest(username, r)
if err != nil {
return nil, fmt.Errorf("couldn't authenticate request for username %s: %s", username, err)
}
// OK now we can do the dereferencing part
// we might already have an entry for this account so check that first
requestingAccount := >smodel.Account{}
err = p.db.GetWhere("uri", requestingAccountURI.String(), requestingAccount)
if err == nil {
// we do have it yay, return it
return requestingAccount, nil
}
if _, ok := err.(db.ErrNoEntries); !ok {
// something has actually gone wrong so bail
return nil, fmt.Errorf("database error getting account with uri %s: %s", requestingAccountURI.String(), err)
}
// we just don't have an entry for this account yet
// what we do now should depend on our chosen federation method
// for now though, we'll just dereference it
// TODO: slow-fed
requestingPerson, err := p.federator.DereferenceRemoteAccount(username, requestingAccountURI)
if err != nil {
return nil, fmt.Errorf("couldn't dereference %s: %s", requestingAccountURI.String(), err)
}
// convert it to our internal account representation
requestingAccount, err = p.tc.ASRepresentationToAccount(requestingPerson)
if err != nil {
return nil, fmt.Errorf("couldn't convert dereferenced uri %s to gtsmodel account: %s", requestingAccountURI.String(), err)
}
// shove it in the database for later
if err := p.db.Put(requestingAccount); err != nil {
return nil, fmt.Errorf("database error inserting account with uri %s: %s", requestingAccountURI.String(), err)
}
// put it in our channel to queue it for async processing
p.FromFederator() <- gtsmodel.FromFederator{
APObjectType: gtsmodel.ActivityStreamsProfile,
APActivityType: gtsmodel.ActivityStreamsCreate,
GTSModel: requestingAccount,
}
return requestingAccount, nil
}
func (p *processor) GetFediUser(requestedUsername string, request *http.Request) (interface{}, ErrorWithCode) {
// get the account the request is referring to
requestedAccount := >smodel.Account{}
if err := p.db.GetLocalAccountByUsername(requestedUsername, requestedAccount); err != nil {
return nil, NewErrorNotFound(fmt.Errorf("database error getting account with username %s: %s", requestedUsername, err))
}
// authenticate the request
requestingAccount, err := p.authenticateAndDereferenceFediRequest(requestedUsername, request)
if err != nil {
return nil, NewErrorNotAuthorized(err)
}
blocked, err := p.db.Blocked(requestedAccount.ID, requestingAccount.ID)
if err != nil {
return nil, NewErrorInternalError(err)
}
if blocked {
return nil, NewErrorNotAuthorized(fmt.Errorf("block exists between accounts %s and %s", requestedAccount.ID, requestingAccount.ID))
}
requestedPerson, err := p.tc.AccountToAS(requestedAccount)
if err != nil {
return nil, NewErrorInternalError(err)
}
data, err := streams.Serialize(requestedPerson)
if err != nil {
return nil, NewErrorInternalError(err)
}
return data, nil
}
func (p *processor) GetWebfingerAccount(requestedUsername string, request *http.Request) (*apimodel.WebfingerAccountResponse, ErrorWithCode) {
// get the account the request is referring to
requestedAccount := >smodel.Account{}
if err := p.db.GetLocalAccountByUsername(requestedUsername, requestedAccount); err != nil {
return nil, NewErrorNotFound(fmt.Errorf("database error getting account with username %s: %s", requestedUsername, err))
}
// return the webfinger representation
return &apimodel.WebfingerAccountResponse{
Subject: fmt.Sprintf("acct:%s@%s", requestedAccount.Username, p.config.Host),
Aliases: []string{
requestedAccount.URI,
requestedAccount.URL,
},
Links: []apimodel.WebfingerLink{
{
Rel: "http://webfinger.net/rel/profile-page",
Type: "text/html",
Href: requestedAccount.URL,
},
{
Rel: "self",
Type: "application/activity+json",
Href: requestedAccount.URI,
},
},
}, nil
}
func (p *processor) InboxPost(ctx context.Context, w http.ResponseWriter, r *http.Request) (bool, error) {
contextWithChannel := context.WithValue(ctx, util.APFromFederatorChanKey, p.fromFederator)
posted, err := p.federator.FederatingActor().PostInbox(contextWithChannel, w, r)
return posted, err
}
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