consul/agent/connect/uri_service.go
Nitya Dhanushkodi 78b170ad50
xds controller: setup watches for and compute leaf cert references in ProxyStateTemplate, and wire up leaf cert manager dependency (#18756)
* Refactors the leafcert package to not have a dependency on agent/consul and agent/cache to avoid import cycles. This way the xds controller can just import the leafcert package to use the leafcert manager.

The leaf cert logic in the controller:
* Sets up watches for leaf certs that are referenced in the ProxyStateTemplate (which generates the leaf certs too).
* Gets the leaf cert from the leaf cert cache
* Stores the leaf cert in the ProxyState that's pushed to xds
* For the cert watches, this PR also uses a bimapper + a thin wrapper to map leaf cert events to related ProxyStateTemplates

Since bimapper uses a resource.Reference or resource.ID to map between two resource types, I've created an internal type for a leaf certificate to use for the resource.Reference, since it's not a v2 resource.
The wrapper allows mapping events to resources (as opposed to mapping resources to resources)

The controller tests:
Unit: Ensure that we resolve leaf cert references
Lifecycle: Ensure that when the CA is updated, the leaf cert is as well

Also adds a new spiffe id type, and adds workload identity and workload identity URI to leaf certs. This is so certs are generated with the new workload identity based SPIFFE id.

* Pulls out some leaf cert test helpers into a helpers file so it
can be used in the xds controller tests.
* Wires up leaf cert manager dependency
* Support getting token from proxytracker
* Add workload identity spiffe id type to the authorize and sign functions



---------

Co-authored-by: John Murret <john.murret@hashicorp.com>
2023-09-12 12:56:43 -07:00

67 lines
1.8 KiB
Go

// Copyright (c) HashiCorp, Inc.
// SPDX-License-Identifier: BUSL-1.1
package connect
import (
"fmt"
"net/url"
"github.com/hashicorp/consul/acl"
"github.com/hashicorp/consul/proto-public/pbresource"
)
// SpiffeIDService is the structure to represent the SPIFFE ID for a service.
type SpiffeIDService struct {
Host string
Partition string
Namespace string
Datacenter string
Service string
}
func (id SpiffeIDService) NamespaceOrDefault() string {
return acl.NamespaceOrDefault(id.Namespace)
}
func (id SpiffeIDService) MatchesPartition(partition string) bool {
return id.PartitionOrDefault() == acl.PartitionOrDefault(partition)
}
// URI returns the *url.URL for this SPIFFE ID.
func (id SpiffeIDService) URI() *url.URL {
var result url.URL
result.Scheme = "spiffe"
result.Host = id.Host
result.Path = id.uriPath()
return &result
}
func (id SpiffeIDService) uriPath() string {
path := fmt.Sprintf("/ns/%s/dc/%s/svc/%s",
id.NamespaceOrDefault(),
id.Datacenter,
id.Service,
)
// Although CE has no support for partitions, it still needs to be able to
// handle exportedPartition from peered Consul Enterprise clusters in order
// to generate the correct SpiffeID.
// We intentionally avoid using pbpartition.DefaultName here to be CE friendly.
if ap := id.PartitionOrDefault(); ap != "" && ap != "default" {
return "/ap/" + ap + path
}
return path
}
// SpiffeIDFromIdentityRef creates the SPIFFE ID from a workload identity.
// TODO (ishustava): make sure ref type is workload identity.
func SpiffeIDFromIdentityRef(trustDomain string, ref *pbresource.Reference) string {
return SpiffeIDWorkloadIdentity{
TrustDomain: trustDomain,
Partition: ref.Tenancy.Partition,
Namespace: ref.Tenancy.Namespace,
WorkloadIdentity: ref.Name,
}.URI().String()
}