package nodepassword import ( "fmt" "os" "strings" "time" "github.com/k3s-io/k3s/pkg/authenticator/hash" "github.com/k3s-io/k3s/pkg/passwd" "github.com/k3s-io/k3s/pkg/version" "github.com/pkg/errors" coreclient "github.com/rancher/wrangler/pkg/generated/controllers/core/v1" "github.com/sirupsen/logrus" v1 "k8s.io/api/core/v1" apierrors "k8s.io/apimachinery/pkg/api/errors" metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" ) var ( // hasher provides the algorithm for generating and verifying hashes hasher = hash.NewSCrypt() ) func getSecretName(nodeName string) string { return strings.ToLower(nodeName + ".node-password." + version.Program) } func verifyHash(secretClient coreclient.SecretClient, nodeName, pass string) error { name := getSecretName(nodeName) secret, err := secretClient.Get(metav1.NamespaceSystem, name, metav1.GetOptions{}) if err != nil { return err } if hash, ok := secret.Data["hash"]; ok { if err := hasher.VerifyHash(string(hash), pass); err != nil { return errors.Wrapf(err, "unable to verify hash for node '%s'", nodeName) } return nil } return fmt.Errorf("unable to locate hash data for node secret '%s'", name) } // Ensure will verify a node-password secret if it exists, otherwise it will create one func Ensure(secretClient coreclient.SecretClient, nodeName, pass string) error { if err := verifyHash(secretClient, nodeName, pass); !apierrors.IsNotFound(err) { return err } hash, err := hasher.CreateHash(pass) if err != nil { return errors.Wrapf(err, "unable to create hash for node '%s'", nodeName) } immutable := true _, err = secretClient.Create(&v1.Secret{ ObjectMeta: metav1.ObjectMeta{ Name: getSecretName(nodeName), Namespace: metav1.NamespaceSystem, }, Immutable: &immutable, Data: map[string][]byte{"hash": []byte(hash)}, }) if apierrors.IsAlreadyExists(err) { return verifyHash(secretClient, nodeName, pass) } return err } // Delete will remove a node-password secret func Delete(secretClient coreclient.SecretClient, nodeName string) error { return secretClient.Delete(metav1.NamespaceSystem, getSecretName(nodeName), &metav1.DeleteOptions{}) } // MigrateFile moves password file entries to secrets func MigrateFile(secretClient coreclient.SecretClient, nodeClient coreclient.NodeClient, passwordFile string) error { _, err := os.Stat(passwordFile) if os.IsNotExist(err) { return nil } if err != nil { return err } passwd, err := passwd.Read(passwordFile) if err != nil { return err } nodeNames := []string{} nodeList, _ := nodeClient.List(metav1.ListOptions{}) if nodeList != nil { for _, node := range nodeList.Items { nodeNames = append(nodeNames, node.Name) } } if len(nodeNames) == 0 { nodeNames = append(nodeNames, passwd.Users()...) } logrus.Infof("Migrating node password entries from '%s'", passwordFile) ensured := int64(0) start := time.Now() for _, nodeName := range nodeNames { if pass, ok := passwd.Pass(nodeName); ok { if err := Ensure(secretClient, nodeName, pass); err != nil { logrus.Warn(errors.Wrapf(err, "error migrating node password entry for node '%s'", nodeName)) } else { ensured++ } } } logrus.Infof("Migrated %d node password entries in %s", ensured, time.Since(start)) return os.Remove(passwordFile) }