util.go

Documentation: k8s.io/kubernetes/pkg/controller/bootstrap

     1  /*
     2  Copyright 2016 The Kubernetes Authors.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package bootstrap
    18  
    19  import (
    20  	"context"
    21  	"time"
    22  
    23  	"k8s.io/klog/v2"
    24  
    25  	"k8s.io/api/core/v1"
    26  	bootstrapapi "k8s.io/cluster-bootstrap/token/api"
    27  	bootstrapsecretutil "k8s.io/cluster-bootstrap/util/secrets"
    28  )
    29  
    30  func validateSecretForSigning(ctx context.Context, secret *v1.Secret) (tokenID, tokenSecret string, ok bool) {
    31  	logger := klog.FromContext(ctx)
    32  	nameTokenID, ok := bootstrapsecretutil.ParseName(secret.Name)
    33  	if !ok {
    34  		logger.V(3).Info("Invalid secret name, must be of the form "+bootstrapapi.BootstrapTokenSecretPrefix+"<secret-id>", "secretName", secret.Name)
    35  		return "", "", false
    36  	}
    37  
    38  	tokenID = bootstrapsecretutil.GetData(secret, bootstrapapi.BootstrapTokenIDKey)
    39  	if len(tokenID) == 0 {
    40  		logger.V(3).Info("No key in Secret", "key", bootstrapapi.BootstrapTokenIDKey, "secret", klog.KObj(secret))
    41  		return "", "", false
    42  	}
    43  
    44  	if nameTokenID != tokenID {
    45  		logger.V(3).Info("Token ID doesn't match secret name", "tokenID", tokenID, "secretName", secret.Name)
    46  		return "", "", false
    47  	}
    48  
    49  	tokenSecret = bootstrapsecretutil.GetData(secret, bootstrapapi.BootstrapTokenSecretKey)
    50  	if len(tokenSecret) == 0 {
    51  		logger.V(3).Info("No key in secret", "key", bootstrapapi.BootstrapTokenSecretKey, "secret", klog.KObj(secret))
    52  		return "", "", false
    53  	}
    54  
    55  	// Ensure this secret hasn't expired.  The TokenCleaner should remove this
    56  	// but if that isn't working or it hasn't gotten there yet we should check
    57  	// here.
    58  	if bootstrapsecretutil.HasExpired(secret, time.Now()) {
    59  		return "", "", false
    60  	}
    61  
    62  	// Make sure this secret can be used for signing
    63  	okToSign := bootstrapsecretutil.GetData(secret, bootstrapapi.BootstrapTokenUsageSigningKey)
    64  	if okToSign != "true" {
    65  		return "", "", false
    66  	}
    67  
    68  	return tokenID, tokenSecret, true
    69  }
    70
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