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kube-arangodb/pkg/api/jwt.go
2023-08-15 15:42:38 +02:00

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3.1 KiB
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//
// DISCLAIMER
//
// Copyright 2016-2023 ArangoDB GmbH, Cologne, Germany
//
// 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.
//
// Copyright holder is ArangoDB GmbH, Cologne, Germany
//
package api
import (
"context"
"fmt"
"time"
jg "github.com/golang-jwt/jwt"
typedCore "k8s.io/client-go/kubernetes/typed/core/v1"
"github.com/arangodb/kube-arangodb/pkg/util"
"github.com/arangodb/kube-arangodb/pkg/util/errors"
"github.com/arangodb/kube-arangodb/pkg/util/globals"
"github.com/arangodb/kube-arangodb/pkg/util/k8sutil"
secret "github.com/arangodb/kube-arangodb/pkg/util/k8sutil/inspector/secret/v1"
"github.com/arangodb/kube-arangodb/pkg/util/k8sutil/kerrors"
)
// ensureJWT ensure that JWT signing key exists or creates a new one.
// It also saves new token into secret if it is not present.
// Returns JWT signing key.
func ensureJWT(cli typedCore.CoreV1Interface, cfg ServerConfig) (string, error) {
secrets := cli.Secrets(cfg.Namespace)
signingKey, err := k8sutil.GetTokenSecret(context.Background(), secrets, cfg.JWTKeySecretName)
if err != nil && kerrors.IsNotFound(err) || signingKey == "" {
signingKey, err = createSigningKey(secrets, cfg.JWTKeySecretName)
if err != nil {
return "", err
}
} else if err != nil {
return "", errors.WithStack(err)
}
_, err = k8sutil.GetTokenSecret(context.Background(), secrets, cfg.JWTSecretName)
if err != nil && kerrors.IsNotFound(err) {
err = generateAndSaveJWT(secrets, cfg)
if err != nil {
return "", err
}
} else if err != nil {
return "", errors.WithStack(err)
}
return signingKey, nil
}
// generateAndSaveJWT tries to generate new JWT using signing key retrieved from secret.
// If it is not present, it creates a new key.
// The resulting JWT is stored in secrets.
func generateAndSaveJWT(secrets secret.Interface, cfg ServerConfig) error {
claims := jg.MapClaims{
"iss": fmt.Sprintf("kube-arangodb/%s", cfg.ServerName),
"iat": time.Now().Unix(),
}
err := k8sutil.CreateJWTFromSecret(context.Background(), secrets, secrets, cfg.JWTSecretName, cfg.JWTKeySecretName, claims, nil)
if err != nil {
return errors.WithStack(err)
}
return err
}
func createSigningKey(secrets secret.ModInterface, keySecretName string) (string, error) {
signingKey := make([]byte, 32)
_, err := util.Rand().Read(signingKey)
if err != nil {
return "", errors.WithStack(err)
}
err = globals.GetGlobalTimeouts().Kubernetes().RunWithTimeout(context.Background(), func(ctxChild context.Context) error {
return k8sutil.CreateTokenSecret(ctxChild, secrets, keySecretName, string(signingKey), nil)
})
if err != nil {
return "", errors.WithStack(err)
}
return string(signingKey), nil
}