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

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* 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
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33
internal/processing/fedi/common.go
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@@ -22,7 +22,6 @@ import (
"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"
)
@@ -45,8 +44,6 @@ func (p *Processor) authenticate(ctx context.Context, requestedUser string) (
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)
@@ -54,33 +51,23 @@ func (p *Processor) authenticate(ctx context.Context, requestedUser string) (
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 pubKeyAuth.Handshaking {
// This should happen very rarely, we are in the middle of handshaking.
err := gtserror.Newf("network race handshaking %s", pubKeyAuth.OwnerURI)
return nil, nil, gtserror.NewErrorInternalError(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))
}
// Get requester from auth.
requester := pubKeyAuth.Owner
// Ensure no block exists between requester + requested.
// Check that block does not exist between receiver and requester.
blocked, err := p.state.DB.IsEitherBlocked(ctx, receiver.ID, requester.ID)
if err != nil {
err = gtserror.Newf("db error getting checking block: %w", err)
err := gtserror.Newf("error 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)
const text = "block exists between accounts"
return nil, nil, gtserror.NewErrorForbidden(errors.New(text))
}
return requester, receiver, nil