mirror of https://github.com/k3s-io/k3s
134 lines
3.6 KiB
Go
134 lines
3.6 KiB
Go
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/v3/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"
|
|
"k8s.io/utils/ptr"
|
|
)
|
|
|
|
var (
|
|
// Hasher provides the algorithm for generating and verifying hashes
|
|
Hasher = hash.NewSCrypt()
|
|
ErrVerifyFailed = errVerifyFailed()
|
|
)
|
|
|
|
type passwordError struct {
|
|
node string
|
|
err error
|
|
}
|
|
|
|
func (e *passwordError) Error() string {
|
|
return fmt.Sprintf("unable to verify password for node %s: %v", e.node, e.err)
|
|
}
|
|
|
|
func (e *passwordError) Is(target error) bool {
|
|
switch target {
|
|
case ErrVerifyFailed:
|
|
return true
|
|
}
|
|
return false
|
|
}
|
|
|
|
func (e *passwordError) Unwrap() error {
|
|
return e.err
|
|
}
|
|
|
|
func errVerifyFailed() error { return &passwordError{} }
|
|
|
|
func getSecretName(nodeName string) string {
|
|
return strings.ToLower(nodeName + ".node-password." + version.Program)
|
|
}
|
|
|
|
func verifyHash(secretClient coreclient.SecretController, nodeName, pass string) error {
|
|
name := getSecretName(nodeName)
|
|
secret, err := secretClient.Cache().Get(metav1.NamespaceSystem, name)
|
|
if err != nil {
|
|
return &passwordError{node: nodeName, err: err}
|
|
}
|
|
if hash, ok := secret.Data["hash"]; ok {
|
|
if err := Hasher.VerifyHash(string(hash), pass); err != nil {
|
|
return &passwordError{node: nodeName, err: err}
|
|
}
|
|
return nil
|
|
}
|
|
return &passwordError{node: nodeName, err: errors.New("password hash not found in node secret")}
|
|
}
|
|
|
|
// Ensure will verify a node-password secret if it exists, otherwise it will create one
|
|
func Ensure(secretClient coreclient.SecretController, nodeName, pass string) error {
|
|
err := verifyHash(secretClient, nodeName, pass)
|
|
if apierrors.IsNotFound(err) {
|
|
var hash string
|
|
hash, err = Hasher.CreateHash(pass)
|
|
if err != nil {
|
|
return &passwordError{node: nodeName, err: err}
|
|
}
|
|
_, err = secretClient.Create(&v1.Secret{
|
|
ObjectMeta: metav1.ObjectMeta{
|
|
Name: getSecretName(nodeName),
|
|
Namespace: metav1.NamespaceSystem,
|
|
},
|
|
Immutable: ptr.To(true),
|
|
Data: map[string][]byte{"hash": []byte(hash)},
|
|
})
|
|
}
|
|
return err
|
|
}
|
|
|
|
// Delete will remove a node-password secret
|
|
func Delete(secretClient coreclient.SecretController, nodeName string) error {
|
|
return secretClient.Delete(metav1.NamespaceSystem, getSecretName(nodeName), &metav1.DeleteOptions{})
|
|
}
|
|
|
|
// MigrateFile moves password file entries to secrets
|
|
func MigrateFile(secretClient coreclient.SecretController, nodeClient coreclient.NodeController, 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.Cache().List(nil)
|
|
for _, node := range nodeList {
|
|
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)
|
|
}
|