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secretmanagerrefs.go
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/
secretmanagerrefs.go
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// Copyright 2024 Google LLC
//
// 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 v1beta1
import (
"context"
"fmt"
"strings"
apierrors "k8s.io/apimachinery/pkg/api/errors"
"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/runtime/schema"
"k8s.io/apimachinery/pkg/types"
"sigs.k8s.io/controller-runtime/pkg/client"
)
type SecretManagerSecretRef struct {
// If provided must be in the format `projects/*/secrets/*`.
External string `json:"external,omitempty"`
// The `name` field of a `SecretManagerSecret` resource.
Name string `json:"name,omitempty"`
// The `metadata.namespace` field of a `SecretManagerSecret` resource.
Namespace string `json:"namespace,omitempty"`
}
type SecretManagerSecret struct {
Ref *SecretManagerSecretRef
ResourceID string
}
// ResolveSecretManagerSecretRef will resolve a partial SecretManagerSecretRef to a SecretManagerSecret.
func ResolveSecretManagerSecretRef(ctx context.Context, reader client.Reader, src client.Object, ref *SecretManagerSecretRef) (*SecretManagerSecret, error) {
if ref == nil {
return nil, nil
}
if ref.Name == "" && ref.External == "" {
return nil, fmt.Errorf("must specify either name or external on SecretManagerSecretRef")
}
if ref.Name != "" && ref.External != "" {
return nil, fmt.Errorf("cannot specify both name and external on SecretManagerSecretRef")
}
// External should be in the "projects/*/secrets/*" format
if ref.External != "" {
tokens := strings.Split(ref.External, "/")
if len(tokens) == 4 && tokens[0] == "project" && tokens[2] == "secrets" {
ref = &SecretManagerSecretRef{
External: fmt.Sprintf("projects/%s/secrets/%s", tokens[1], tokens[3]),
}
return &SecretManagerSecret{Ref: ref, ResourceID: tokens[3]}, nil
}
return nil, fmt.Errorf("format of secretManagerSecretRef external=%q was not known (use projects/<projectId>/secrets/<secretID>)", ref.External)
}
key := types.NamespacedName{
Namespace: ref.Namespace,
Name: ref.Name,
}
if key.Namespace == "" {
key.Namespace = src.GetNamespace()
}
// Fetch object from k8s cluster to construct the external form
secret := &unstructured.Unstructured{}
secret.SetGroupVersionKind(schema.GroupVersionKind{
Group: "secretmanager.cnrm.cloud.google.com",
Version: "v1beta1",
Kind: "SecretManagerSecret",
})
if err := reader.Get(ctx, key, secret); err != nil {
if apierrors.IsNotFound(err) {
return nil, fmt.Errorf("referenced SecretManagerSecret %v not found", key)
}
return nil, fmt.Errorf("error reading referenced SecretManagerSecret %v: %w", key, err)
}
secretResourceID, err := GetResourceID(secret)
if err != nil {
return nil, err
}
secretProjectID, err := ResolveProjectID(ctx, reader, secret)
if err != nil {
return nil, err
}
ref = &SecretManagerSecretRef{
External: fmt.Sprintf("projects/%s/secrets/%s", secretProjectID, secretResourceID),
}
return &SecretManagerSecret{Ref: ref, ResourceID: secretResourceID}, nil
}
func ResolveSecretIDForObject(ctx context.Context, reader client.Reader, obj *unstructured.Unstructured) (*SecretManagerSecret, error) {
ref := &SecretManagerSecretRef{}
refObj, found, err := unstructured.NestedMap(obj.Object, "spec", "secretRef")
if err != nil {
return nil, fmt.Errorf("getting spec.secretRef: %w", err)
}
if !found {
return nil, fmt.Errorf("spec.secretRef not found in object")
}
if err := runtime.DefaultUnstructuredConverter.FromUnstructured(refObj, ref); err != nil {
return nil, fmt.Errorf("converting spec.secretRef: %w", err)
}
return ResolveSecretManagerSecretRef(ctx, reader, obj, ref)
}
type SecretManagerSecretVersionRef struct {
// If provided must be in the format `projects/*/secrets/*/versions/*`.
External string `json:"external,omitempty"`
// The `name` field of a `SecretManagerSecretVersion` resource.
Name string `json:"name,omitempty"`
// The `metadata.namespace` field of a `SecretManagerSecretVersion` resource.
Namespace string `json:"namespace,omitempty"`
}
// ResolveSecretManagerSecretVersionRef will resolve a SecretManagerSecretVersionRef to a SecretManagerSecretVersion.
func ResolveSecretManagerSecretVersionRef(ctx context.Context, reader client.Reader, src client.Object, ref *SecretManagerSecretVersionRef) (*SecretManagerSecretVersionRef, error) {
if ref == nil {
return nil, nil
}
if ref.Name == "" && ref.External == "" {
return nil, fmt.Errorf("must specify either name or external on SecretManagerSecretVersionRef")
}
if ref.Name != "" && ref.External != "" {
return nil, fmt.Errorf("cannot specify both name and external on SecretManagerSecretVersionRef")
}
// External should be in the "projects/*/secrets/*/versions/*" format
if ref.External != "" {
tokens := strings.Split(ref.External, "/")
if len(tokens) == 6 && tokens[0] == "project" && tokens[2] == "secrets" && tokens[4] == "versions" {
ref = &SecretManagerSecretVersionRef{
External: fmt.Sprintf("projects/%s/secrets/%s/versions/%s", tokens[1], tokens[3], tokens[5]),
}
return ref, nil
}
return nil, fmt.Errorf("format of secretManagerSecretVersionRef external=%q was not known (use projects/<projectId>/secrets/<secretID>/versions/<versionID>)", ref.External)
}
key := types.NamespacedName{
Namespace: ref.Namespace,
Name: ref.Name,
}
if key.Namespace == "" {
key.Namespace = src.GetNamespace()
}
// Fetch object from k8s cluster to construct the external form
secretversion := &unstructured.Unstructured{}
secretversion.SetGroupVersionKind(schema.GroupVersionKind{
Group: "secretmanager.cnrm.cloud.google.com",
Version: "v1beta1",
Kind: "SecretManagerSecretVersion",
})
if err := reader.Get(ctx, key, secretversion); err != nil {
if apierrors.IsNotFound(err) {
return nil, fmt.Errorf("referenced SecretManagerSecretVersion %v not found", key)
}
return nil, fmt.Errorf("error reading referenced SecretManagerSecretVersion %v: %w", key, err)
}
secretversionResourceID, err := GetResourceID(secretversion)
if err != nil {
return nil, err
}
secretversionProjectID, err := ResolveProjectID(ctx, reader, secretversion)
if err != nil {
return nil, err
}
secretID, err := ResolveSecretIDForObject(ctx, reader, secretversion)
if err != nil {
return nil, err
}
ref = &SecretManagerSecretVersionRef{
External: fmt.Sprintf("projects/%s/secrets/%s/versions/%s", secretversionProjectID, secretID.ResourceID, secretversionResourceID),
}
return ref, nil
}