SuperSeriousBusiness/GoToSocial
1
1
Fork 0
mirror of https://github.com/superseriousbusiness/gotosocial synced 2025-06-05 21:59:39 +02:00
Code Issues Projects Releases Wiki Activity

[chore/security] refactor AuthenticateFederatedRequest() to handle account deref + suspension checks (#2371)

Browse Source 
* refactor AuthenticateFederatedRequest() to handle account suspension + fetching of owner

* small fixups

* small changes

* revert to 'IsEitherBlocked' instead of just 'IsBlocked" :grimace:

* update code comment to indicate that AuthenticateFederatedRequest() will handle account + instance dereferencing
This commit is contained in:
kim
2023-11-21 10:35:30 +00:00
committed by GitHub
parent 1ba3e14b36
commit 42d8011ff4
7 changed files with 205 additions and 198 deletions
Download Patch File Download Diff File Expand all files Collapse all files

69
internal/processing/fedi/user.go
View File

@@ -26,7 +26,6 @@ import (
"github.com/superseriousbusiness/activity/streams/vocab"
"github.com/superseriousbusiness/gotosocial/internal/ap"
"github.com/superseriousbusiness/gotosocial/internal/db"
"github.com/superseriousbusiness/gotosocial/internal/gtscontext"
"github.com/superseriousbusiness/gotosocial/internal/gtserror"
"github.com/superseriousbusiness/gotosocial/internal/uris"
)
@@ -35,7 +34,7 @@ import (
// performing authentication before returning a JSON serializable interface to the caller.
func (p *Processor) UserGet(ctx context.Context, requestedUsername string, requestURL *url.URL) (interface{}, gtserror.WithCode) {
// (Try to) get the requested local account from the db.
requestedAccount, err := p.state.DB.GetAccountByUsernameDomain(ctx, requestedUsername, "")
receiver, err := p.state.DB.GetAccountByUsernameDomain(ctx, requestedUsername, "")
if err != nil {
if errors.Is(err, db.ErrNoEntries) {
// Account just not found w/ this username.
@@ -54,8 +53,9 @@ func (p *Processor) UserGet(ctx context.Context, requestedUsername string, reque
// the bare minimum user profile needed for the pubkey.
//
// TODO: https://github.com/superseriousbusiness/gotosocial/issues/1186
minimalPerson, err := p.converter.AccountToASMinimal(ctx, requestedAccount)
minimalPerson, err := p.converter.AccountToASMinimal(ctx, receiver)
if err != nil {
err := gtserror.Newf("error converting to minimal account: %w", err)
return nil, gtserror.NewErrorInternalError(err)
}
@@ -72,56 +72,39 @@ func (p *Processor) UserGet(ctx context.Context, requestedUsername string, reque
}
// Auth passed, generate the proper AP representation.
person, err := p.converter.AccountToAS(ctx, requestedAccount)
person, err := p.converter.AccountToAS(ctx, receiver)
if err != nil {
err := gtserror.Newf("error converting account: %w", err)
return nil, gtserror.NewErrorInternalError(err)
}
// If we are currently handshaking with the remote account
// making the request, then don't be coy: just serve the AP
// representation of the target account.
//
// This handshake check ensures that we don't get stuck in
// a loop with another GtS instance, where each instance is
// trying repeatedly to dereference the other account that's
// making the request before it will reveal its own account.
//
// Instead, we end up in an 'I'll show you mine if you show me
// yours' situation, where we sort of agree to reveal each
// other's profiles at the same time.
if p.federator.Handshaking(requestedUsername, pubKeyAuth.OwnerURI) {
if pubKeyAuth.Handshaking {
// If we are currently handshaking with the remote account
// making the request, then don't be coy: just serve the AP
// representation of the target account.
//
// This handshake check ensures that we don't get stuck in
// a loop with another GtS instance, where each instance is
// trying repeatedly to dereference the other account that's
// making the request before it will reveal its own account.
//
// Instead, we end up in an 'I'll show you mine if you show me
// yours' situation, where we sort of agree to reveal each
// other's profiles at the same time.
return data(person)
}
// We're not currently handshaking with the requestingAccountURI,
// so fetch its details and ensure it's up to date + not blocked.
requestingAccount, _, err := p.federator.GetAccountByURI(
// On a hot path so fail quickly.
gtscontext.SetFastFail(ctx),
requestedUsername,
pubKeyAuth.OwnerURI,
)
if err != nil {
err := gtserror.Newf("error getting account %s: %w", pubKeyAuth.OwnerURI, err)
return nil, gtserror.NewErrorUnauthorized(err)
}
// Get requester from auth.
requester := pubKeyAuth.Owner
if !requestingAccount.SuspendedAt.IsZero() {
// Account was marked as suspended by a
// local admin action. Stop request early.
err = fmt.Errorf("account %s marked as suspended", requestingAccount.ID)
return nil, gtserror.NewErrorForbidden(err)
}
blocked, err := p.state.DB.IsBlocked(ctx, requestedAccount.ID, requestingAccount.ID)
// Check that block does not exist between receiver and requester.
blocked, err := p.state.DB.IsBlocked(ctx, receiver.ID, requester.ID)
if err != nil {
err := gtserror.Newf("error checking block from account %s to account %s: %w", requestedAccount.ID, requestingAccount.ID, err)
err := gtserror.Newf("error checking block: %w", err)
return nil, gtserror.NewErrorInternalError(err)
}
if blocked {
err := fmt.Errorf("account %s blocks account %s", requestedAccount.ID, requestingAccount.ID)
return nil, gtserror.NewErrorForbidden(err)
} else if blocked {
const text = "block exists between accounts"
return nil, gtserror.NewErrorForbidden(errors.New(text))
}
return data(person)