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ns_server.go
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ns_server.go
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// Copyright (c) 2022-2023 Cisco and/or its affiliates.
//
// SPDX-License-Identifier: Apache-2.0
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at:
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// Package authorize provides authz checks for incoming or returning connections.
package authorize
import (
"context"
"github.com/edwarnicke/genericsync"
"github.com/golang/protobuf/ptypes/empty"
"github.com/networkservicemesh/api/pkg/api/registry"
"github.com/networkservicemesh/sdk/pkg/registry/common/grpcmetadata"
"github.com/networkservicemesh/sdk/pkg/registry/core/next"
)
type authorizeNSServer struct {
policies policiesList
nsPathIdsMap *genericsync.Map[string, []string]
}
// NewNetworkServiceRegistryServer - returns a new authorization registry.NetworkServiceRegistryServer
// Authorize registry server checks spiffeID of NS.
func NewNetworkServiceRegistryServer(opts ...Option) registry.NetworkServiceRegistryServer {
o := &options{
resourcePathIdsMap: new(genericsync.Map[string, []string]),
}
for _, opt := range opts {
opt(o)
}
return &authorizeNSServer{
policies: o.policies,
nsPathIdsMap: o.resourcePathIdsMap,
}
}
func (s *authorizeNSServer) Register(ctx context.Context, ns *registry.NetworkService) (*registry.NetworkService, error) {
if len(s.policies) == 0 {
return next.NetworkServiceRegistryServer(ctx).Register(ctx, ns)
}
path := grpcmetadata.PathFromContext(ctx)
spiffeID := getSpiffeIDFromPath(ctx, path)
leftSide := getLeftSideOfPath(path)
rawMap := getRawMap(s.nsPathIdsMap)
input := RegistryOpaInput{
ResourceID: spiffeID.String(),
ResourceName: ns.Name,
ResourcePathIdsMap: rawMap,
PathSegments: leftSide.PathSegments,
Index: leftSide.Index,
}
if err := s.policies.check(ctx, input); err != nil {
return nil, err
}
s.nsPathIdsMap.Store(ns.Name, ns.PathIds)
return next.NetworkServiceRegistryServer(ctx).Register(ctx, ns)
}
func (s *authorizeNSServer) Find(query *registry.NetworkServiceQuery, server registry.NetworkServiceRegistry_FindServer) error {
return next.NetworkServiceRegistryServer(server.Context()).Find(query, server)
}
func (s *authorizeNSServer) Unregister(ctx context.Context, ns *registry.NetworkService) (*empty.Empty, error) {
if len(s.policies) == 0 {
return next.NetworkServiceRegistryServer(ctx).Unregister(ctx, ns)
}
path := grpcmetadata.PathFromContext(ctx)
spiffeID := getSpiffeIDFromPath(ctx, path)
leftSide := getLeftSideOfPath(path)
rawMap := getRawMap(s.nsPathIdsMap)
input := RegistryOpaInput{
ResourceID: spiffeID.String(),
ResourceName: ns.Name,
ResourcePathIdsMap: rawMap,
PathSegments: leftSide.PathSegments,
Index: leftSide.Index,
}
if err := s.policies.check(ctx, input); err != nil {
return nil, err
}
s.nsPathIdsMap.Delete(ns.Name)
return next.NetworkServiceRegistryServer(ctx).Unregister(ctx, ns)
}