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headlessauthn.go
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/
headlessauthn.go
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/*
* Teleport
* Copyright (C) 2023 Gravitational, Inc.
*
* 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 local
import (
"context"
"github.com/gravitational/trace"
"github.com/gravitational/teleport/api/types"
"github.com/gravitational/teleport/lib/backend"
"github.com/gravitational/teleport/lib/services"
"github.com/gravitational/teleport/lib/utils"
)
// UpsertHeadlessAuthentication upserts a headless authentication in the backend.
func (s *IdentityService) UpsertHeadlessAuthentication(ctx context.Context, ha *types.HeadlessAuthentication) error {
item, err := marshalHeadlessAuthenticationToItem(ha)
if err != nil {
return trace.Wrap(err)
}
_, err = s.Put(ctx, *item)
return trace.Wrap(err)
}
// CompareAndSwapHeadlessAuthentication validates the new headless authentication and
// performs a compare and swap replacement on a headless authentication resource.
func (s *IdentityService) CompareAndSwapHeadlessAuthentication(ctx context.Context, old, new *types.HeadlessAuthentication) (*types.HeadlessAuthentication, error) {
if err := services.ValidateHeadlessAuthentication(new); err != nil {
return nil, trace.Wrap(err)
}
oldItem, err := marshalHeadlessAuthenticationToItem(old)
if err != nil {
return nil, trace.Wrap(err)
}
newItem, err := marshalHeadlessAuthenticationToItem(new)
if err != nil {
return nil, trace.Wrap(err)
}
_, err = s.CompareAndSwap(ctx, *oldItem, *newItem)
if err != nil {
return nil, trace.Wrap(err)
}
return new, nil
}
// GetHeadlessAuthentication returns a headless authentication from the backend.
func (s *IdentityService) GetHeadlessAuthentication(ctx context.Context, username, name string) (*types.HeadlessAuthentication, error) {
item, err := s.Get(ctx, headlessAuthenticationKey(username, name))
if err != nil {
return nil, trace.Wrap(err)
}
headlessAuthn, err := unmarshalHeadlessAuthenticationFromItem(item)
if err != nil {
return nil, trace.Wrap(err)
}
return headlessAuthn, nil
}
// GetHeadlessAuthentications returns all headless authentications from the backend.
func (s *IdentityService) GetHeadlessAuthentications(ctx context.Context) ([]*types.HeadlessAuthentication, error) {
rangeStart := backend.ExactKey(headlessAuthenticationPrefix)
rangeEnd := backend.RangeEnd(rangeStart)
items, err := s.GetRange(ctx, rangeStart, rangeEnd, 0)
if err != nil {
return nil, trace.Wrap(err)
}
headlessAuthns := make([]*types.HeadlessAuthentication, len(items.Items))
for i, item := range items.Items {
headlessAuthn, err := unmarshalHeadlessAuthenticationFromItem(&item)
if err != nil {
return nil, trace.Wrap(err)
}
headlessAuthns[i] = headlessAuthn
}
return headlessAuthns, nil
}
// DeleteHeadlessAuthentication deletes a headless authentication from the backend.
func (s *IdentityService) DeleteHeadlessAuthentication(ctx context.Context, username, name string) error {
return trace.Wrap(s.Delete(ctx, headlessAuthenticationKey(username, name)))
}
// DeleteAllHeadlessAuthentications deletes all headless authentications from the backend.
func (s *IdentityService) DeleteAllHeadlessAuthentications(ctx context.Context) error {
startKey := backend.ExactKey(headlessAuthenticationPrefix)
return s.DeleteRange(ctx, startKey, backend.RangeEnd(startKey))
}
// marshalHeadlessAuthenticationToItem marshals a headless authentication to a backend.Item.
func marshalHeadlessAuthenticationToItem(headlessAuthn *types.HeadlessAuthentication) (*backend.Item, error) {
value, err := marshalHeadlessAuthentication(headlessAuthn)
if err != nil {
return nil, trace.Wrap(err)
}
return &backend.Item{
Key: headlessAuthenticationKey(headlessAuthn.User, headlessAuthn.Metadata.Name),
Value: value,
Expires: *headlessAuthn.Metadata.Expires,
}, nil
}
// marshalHeadlessAuthentication marshals a headless authentication to JSON.
func marshalHeadlessAuthentication(ha *types.HeadlessAuthentication) ([]byte, error) {
if err := ha.CheckAndSetDefaults(); err != nil {
return nil, trace.Wrap(err)
}
return utils.FastMarshal(ha)
}
// unmarshalHeadlessAuthenticationFromItem unmarshals a headless authentication from a backend.Item.
func unmarshalHeadlessAuthenticationFromItem(item *backend.Item) (*types.HeadlessAuthentication, error) {
return unmarshalHeadlessAuthentication(item.Value)
}
// unmarshalHeadlessAuthentication unmarshals a headless authentication from JSON.
func unmarshalHeadlessAuthentication(data []byte) (*types.HeadlessAuthentication, error) {
var headlessAuthn types.HeadlessAuthentication
if err := utils.FastUnmarshal(data, &headlessAuthn); err != nil {
return nil, trace.Wrap(err, "error unmarshalling headless authentication from storage")
}
if err := headlessAuthn.CheckAndSetDefaults(); err != nil {
return nil, trace.Wrap(err)
}
return &headlessAuthn, nil
}
const headlessAuthenticationPrefix = "headless_authentication"
func headlessAuthenticationKey(username, name string) []byte {
return backend.Key(headlessAuthenticationPrefix, usersPrefix, username, name)
}