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manager.go
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manager.go
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package graph
// Copyright (c) Microsoft Corporation.
// Licensed under the Apache License 2.0.
import (
"context"
"encoding/json"
"io"
"strings"
mgmtstorage "github.com/Azure/azure-sdk-for-go/services/storage/mgmt/2019-06-01/storage"
"github.com/sirupsen/logrus"
"github.com/Azure/ARO-RP/pkg/env"
"github.com/Azure/ARO-RP/pkg/util/encryption"
"github.com/Azure/ARO-RP/pkg/util/storage"
)
type Manager interface {
Exists(ctx context.Context, resourceGroup, account string) (bool, error)
LoadPersisted(ctx context.Context, resourceGroup, account string) (PersistedGraph, error)
}
type manager struct {
log *logrus.Entry
aead encryption.AEAD
storage storage.Manager
env env.Interface
}
func NewManager(env env.Interface, log *logrus.Entry, aead encryption.AEAD, storage storage.Manager) Manager {
return &manager{
log: log,
aead: aead,
storage: storage,
env: env,
}
}
func (m *manager) Exists(ctx context.Context, resourceGroup, account string) (bool, error) {
m.log.Print("checking if graph exists")
blobService, err := m.storage.BlobService(ctx, resourceGroup, account, mgmtstorage.Permissions("r"), mgmtstorage.SignedResourceTypesO)
if err != nil {
return false, err
}
aro := blobService.GetContainerReference("aro")
return aro.GetBlobReference("graph").Exists()
}
func (m *manager) LoadPersisted(ctx context.Context, resourceGroup, account string) (PersistedGraph, error) {
pg, err := m.loadPersisted(ctx, resourceGroup, account)
if err == nil || !strings.Contains(err.Error(), "chacha20poly1305: message authentication failed") {
return pg, err
}
m.log.Infof("cluster graph key changed, reloading AEAD")
if err = m.reloadAead(ctx); err != nil {
m.log.Errorf("failed to reload AEAD, error: %v", err)
return nil, err
}
return m.loadPersisted(ctx, resourceGroup, account)
}
func (m *manager) reloadAead(ctx context.Context) (err error) {
m.aead, err = encryption.NewMulti(ctx, m.env.ServiceKeyvault(), env.EncryptionSecretV2Name, env.EncryptionSecretName)
return err
}
func (m *manager) loadPersisted(ctx context.Context, resourceGroup, account string) (PersistedGraph, error) {
m.log.Print("load persisted graph")
blobService, err := m.storage.BlobService(ctx, resourceGroup, account, mgmtstorage.Permissions("r"), mgmtstorage.SignedResourceTypesO)
if err != nil {
return nil, err
}
aro := blobService.GetContainerReference("aro")
cluster := aro.GetBlobReference("graph")
rc, err := cluster.Get(nil)
if err != nil {
return nil, err
}
defer rc.Close()
b, err := io.ReadAll(rc)
if err != nil {
return nil, err
}
b, err = m.aead.Open(b)
if err != nil {
return nil, err
}
var pg PersistedGraph
err = json.Unmarshal(b, &pg)
if err != nil {
return nil, err
}
return pg, nil
}
// SavePersistedGraph could be implemented and used with care if needed, but
// currently we don't need it (and it's better that way)