73 lines
1.9 KiB
Go
73 lines
1.9 KiB
Go
/*
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Copyright 2020 The KubeSphere 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 pkiutil
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import (
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"crypto"
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cryptorand "crypto/rand"
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"crypto/rsa"
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"crypto/x509"
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"crypto/x509/pkix"
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"github.com/pkg/errors"
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certutil "k8s.io/client-go/util/cert"
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)
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const (
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rsaKeySize = 2048
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)
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// NewCSRAndKey generates a new key and CSR and that could be signed to create the given certificate
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func NewCSRAndKey(config *certutil.Config) (*x509.CertificateRequest, *rsa.PrivateKey, error) {
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key, err := NewPrivateKey()
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if err != nil {
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return nil, nil, errors.Wrap(err, "unable to create private key")
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}
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csr, err := NewCSR(*config, key)
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if err != nil {
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return nil, nil, errors.Wrap(err, "unable to generate CSR")
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}
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return csr, key, nil
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}
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// NewCSR creates a new CSR
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func NewCSR(cfg certutil.Config, key crypto.Signer) (*x509.CertificateRequest, error) {
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template := &x509.CertificateRequest{
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Subject: pkix.Name{
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CommonName: cfg.CommonName,
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Organization: cfg.Organization,
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},
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DNSNames: cfg.AltNames.DNSNames,
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IPAddresses: cfg.AltNames.IPs,
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}
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csrBytes, err := x509.CreateCertificateRequest(cryptorand.Reader, template, key)
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if err != nil {
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return nil, errors.Wrap(err, "failed to create a CSR")
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}
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return x509.ParseCertificateRequest(csrBytes)
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}
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// NewPrivateKey creates an RSA private key
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func NewPrivateKey() (*rsa.PrivateKey, error) {
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return rsa.GenerateKey(cryptorand.Reader, rsaKeySize)
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}
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