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secrets.go
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secrets.go
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package secrets
import (
"encoding/base64"
"encoding/json"
"fmt"
"strconv"
"time"
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime/schema"
apiserverconfigv1 "k8s.io/apiserver/pkg/apis/config/v1"
corev1client "k8s.io/client-go/kubernetes/typed/core/v1"
"github.com/openshift/library-go/pkg/operator/encryption/state"
)
// ToKeyState converts a key secret to a key state.
func ToKeyState(s *corev1.Secret) (state.KeyState, error) {
data := s.Data[EncryptionSecretKeyDataKey]
keyID, validKeyID := state.NameToKeyID(s.Name)
if !validKeyID {
return state.KeyState{}, fmt.Errorf("secret %s/%s has an invalid name", s.Namespace, s.Name)
}
key := state.KeyState{
Key: apiserverconfigv1.Key{
// we use keyID as the name to limit the length of the field as it is used as a prefix for every value in etcd
Name: strconv.FormatUint(keyID, 10),
Secret: base64.StdEncoding.EncodeToString(data),
},
Backed: true,
}
if v, ok := s.Annotations[EncryptionSecretMigratedTimestamp]; ok {
ts, err := time.Parse(time.RFC3339, v)
if err != nil {
return state.KeyState{}, fmt.Errorf("secret %s/%s has invalid %s annotation: %v", s.Namespace, s.Name, EncryptionSecretMigratedTimestamp, err)
}
key.Migrated.Timestamp = ts
}
if v, ok := s.Annotations[EncryptionSecretMigratedResources]; ok && len(v) > 0 {
migrated := &MigratedGroupResources{}
if err := json.Unmarshal([]byte(v), migrated); err != nil {
return state.KeyState{}, fmt.Errorf("secret %s/%s has invalid %s annotation: %v", s.Namespace, s.Name, EncryptionSecretMigratedResources, err)
}
key.Migrated.Resources = migrated.Resources
}
if v, ok := s.Annotations[encryptionSecretInternalReason]; ok && len(v) > 0 {
key.InternalReason = v
}
if v, ok := s.Annotations[encryptionSecretExternalReason]; ok && len(v) > 0 {
key.ExternalReason = v
}
keyMode := state.Mode(s.Annotations[encryptionSecretMode])
switch keyMode {
case state.AESCBC, state.SecretBox, state.Identity:
key.Mode = keyMode
default:
return state.KeyState{}, fmt.Errorf("secret %s/%s has invalid mode: %s", s.Namespace, s.Name, keyMode)
}
if keyMode != state.Identity && len(data) == 0 {
return state.KeyState{}, fmt.Errorf("secret %s/%s of mode %q must have non-empty key", s.Namespace, s.Name, keyMode)
}
return key, nil
}
// ToKeyState converts a key state to a key secret.
func FromKeyState(component string, ks state.KeyState) (*corev1.Secret, error) {
bs, err := base64.StdEncoding.DecodeString(ks.Key.Secret)
if err != nil {
return nil, fmt.Errorf("failed to decode key string")
}
s := &corev1.Secret{
ObjectMeta: metav1.ObjectMeta{
Name: fmt.Sprintf("encryption-key-%s-%s", component, ks.Key.Name),
Namespace: "openshift-config-managed",
Labels: map[string]string{
EncryptionKeySecretsLabel: component,
},
Annotations: map[string]string{
state.KubernetesDescriptionKey: state.KubernetesDescriptionScaryValue,
encryptionSecretMode: string(ks.Mode),
encryptionSecretInternalReason: ks.InternalReason,
encryptionSecretExternalReason: ks.ExternalReason,
},
Finalizers: []string{EncryptionSecretFinalizer},
},
Data: map[string][]byte{
EncryptionSecretKeyDataKey: bs,
},
}
if !ks.Migrated.Timestamp.IsZero() {
s.Annotations[EncryptionSecretMigratedTimestamp] = ks.Migrated.Timestamp.Format(time.RFC3339)
}
if len(ks.Migrated.Resources) > 0 {
migrated := MigratedGroupResources{Resources: ks.Migrated.Resources}
bs, err := json.Marshal(migrated)
if err != nil {
return nil, err
}
s.Annotations[EncryptionSecretMigratedResources] = string(bs)
}
return s, nil
}
// HasResource returns whether the given group resource is contained in the migrated group resource list.
func (m *MigratedGroupResources) HasResource(resource schema.GroupResource) bool {
for _, gr := range m.Resources {
if gr == resource {
return true
}
}
return false
}
// ListKeySecrets returns the current key secrets from openshift-config-managed.
func ListKeySecrets(secretClient corev1client.SecretsGetter, encryptionSecretSelector metav1.ListOptions) ([]*corev1.Secret, error) {
encryptionSecretList, err := secretClient.Secrets("openshift-config-managed").List(encryptionSecretSelector)
if err != nil {
return nil, err
}
var encryptionSecrets []*corev1.Secret
for i := range encryptionSecretList.Items {
encryptionSecrets = append(encryptionSecrets, &encryptionSecretList.Items[i])
}
return encryptionSecrets, nil
}