mirror of https://github.com/kubernetes/kops.git
70 lines
1.5 KiB
Go
70 lines
1.5 KiB
Go
/*
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Copyright 2021 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package pki
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import (
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"crypto"
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"crypto/x509"
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"encoding/pem"
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"fmt"
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"k8s.io/klog/v2"
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)
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func ParsePEMPublicKey(data []byte) (*PublicKey, error) {
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k, err := parsePEMPublicKey(data)
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if err != nil {
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return nil, err
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}
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if k == nil {
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return nil, nil
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}
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return &PublicKey{Key: k}, nil
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}
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type PublicKey struct {
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Key crypto.PublicKey
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}
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func parsePEMPublicKey(pemData []byte) (crypto.PublicKey, error) {
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for {
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block, rest := pem.Decode(pemData)
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if block == nil {
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return nil, fmt.Errorf("could not parse private key")
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}
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switch block.Type {
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case "RSA PUBLIC KEY":
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k, err := x509.ParsePKCS1PublicKey(block.Bytes)
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if err != nil {
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return nil, err
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}
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return k, nil
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case "PUBLIC KEY":
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k, err := x509.ParsePKIXPublicKey(block.Bytes)
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if err != nil {
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return nil, err
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}
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return k.(crypto.PublicKey), nil
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default:
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klog.Infof("Ignoring unexpected PEM block: %q", block.Type)
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}
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pemData = rest
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}
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}
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