k8s.io/kubernetes@v1.29.3/pkg/apis/certificates/v1beta1/defaults.go (about)

     1  /*
     2  Copyright 2017 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 v1beta1
    18  
    19  import (
    20  	"crypto/x509"
    21  
    22  	certificatesv1beta1 "k8s.io/api/certificates/v1beta1"
    23  	v1 "k8s.io/api/core/v1"
    24  	"k8s.io/apimachinery/pkg/runtime"
    25  	"k8s.io/apimachinery/pkg/util/sets"
    26  	certificates "k8s.io/kubernetes/pkg/apis/certificates"
    27  )
    28  
    29  func addDefaultingFuncs(scheme *runtime.Scheme) error {
    30  	return RegisterDefaults(scheme)
    31  }
    32  
    33  func SetDefaults_CertificateSigningRequestSpec(obj *certificatesv1beta1.CertificateSigningRequestSpec) {
    34  	if obj.Usages == nil {
    35  		obj.Usages = []certificatesv1beta1.KeyUsage{certificatesv1beta1.UsageDigitalSignature, certificatesv1beta1.UsageKeyEncipherment}
    36  	}
    37  
    38  	if obj.SignerName == nil {
    39  		signerName := DefaultSignerNameFromSpec(obj)
    40  		obj.SignerName = &signerName
    41  	}
    42  }
    43  
    44  func SetDefaults_CertificateSigningRequestCondition(obj *certificatesv1beta1.CertificateSigningRequestCondition) {
    45  	if len(obj.Status) == 0 {
    46  		obj.Status = v1.ConditionTrue
    47  	}
    48  }
    49  
    50  // DefaultSignerNameFromSpec will determine the signerName that should be set
    51  // by attempting to inspect the 'request' content and the spec options.
    52  func DefaultSignerNameFromSpec(obj *certificatesv1beta1.CertificateSigningRequestSpec) string {
    53  	csr, err := ParseCSR(obj.Request)
    54  	switch {
    55  	case err != nil:
    56  		// Set the signerName to 'legacy-unknown' as the CSR could not be
    57  		// recognised.
    58  		return certificatesv1beta1.LegacyUnknownSignerName
    59  	case IsKubeletClientCSR(csr, obj.Usages):
    60  		return certificatesv1beta1.KubeAPIServerClientKubeletSignerName
    61  	case IsKubeletServingCSR(csr, obj.Usages):
    62  		return certificatesv1beta1.KubeletServingSignerName
    63  	default:
    64  		return certificatesv1beta1.LegacyUnknownSignerName
    65  	}
    66  }
    67  
    68  func IsKubeletServingCSR(req *x509.CertificateRequest, usages []certificatesv1beta1.KeyUsage) bool {
    69  	return certificates.IsKubeletServingCSR(req, usagesToSet(usages))
    70  }
    71  
    72  func IsKubeletClientCSR(req *x509.CertificateRequest, usages []certificatesv1beta1.KeyUsage) bool {
    73  	return certificates.IsKubeletClientCSR(req, usagesToSet(usages))
    74  }
    75  
    76  func usagesToSet(usages []certificatesv1beta1.KeyUsage) sets.String {
    77  	result := sets.NewString()
    78  	for _, usage := range usages {
    79  		result.Insert(string(usage))
    80  	}
    81  	return result
    82  }