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crl.go
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crl.go
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/*-
* Copyright 2016 Square Inc.
* Copyright 2014 CoreOS
*
* 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.
*/
package pkix
import (
"bytes"
"crypto/rand"
"crypto/x509/pkix"
"encoding/pem"
"errors"
"time"
)
const (
crlPEMBlockType = "X509 CRL"
)
func CreateCertificateRevocationList(key *Key, ca *Certificate, years int) (*CertificateRevocationList, error) {
rawCrt, err := ca.GetRawCertificate()
if err != nil {
return nil, err
}
crlBytes, err := rawCrt.CreateCRL(rand.Reader, key.Private, []pkix.RevokedCertificate{}, time.Now(), time.Now().AddDate(years, 0, 0))
if err != nil {
return nil, err
}
return NewCertificateRevocationListFromDER(crlBytes), nil
}
// CertificateSigningRequest is a wrapper around a x509 CertificateRequest and its DER-formatted bytes
type CertificateRevocationList struct {
derBytes []byte
}
// NewCertificateRevocationListFromDER inits CertificateRevocationList from DER-format bytes
func NewCertificateRevocationListFromDER(derBytes []byte) *CertificateRevocationList {
return &CertificateRevocationList{derBytes: derBytes}
}
// NewCertificateRevocationListFromPEM inits CertificateRevocationList from PEM-format bytes
func NewCertificateRevocationListFromPEM(data []byte) (*CertificateRevocationList, error) {
pemBlock, _ := pem.Decode(data)
if pemBlock == nil {
return nil, errors.New("cannot find the next PEM formatted block")
}
if pemBlock.Type != crlPEMBlockType || len(pemBlock.Headers) != 0 {
return nil, errors.New("unmatched type or headers")
}
return &CertificateRevocationList{derBytes: pemBlock.Bytes}, nil
}
// Export returns PEM-format bytes
func (c *CertificateRevocationList) Export() ([]byte, error) {
pemBlock := &pem.Block{
Type: crlPEMBlockType,
Headers: nil,
Bytes: c.derBytes,
}
buf := new(bytes.Buffer)
if err := pem.Encode(buf, pemBlock); err != nil {
return nil, err
}
return buf.Bytes(), nil
}