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/*
* ============LICENSE_START=======================================================
* oom-certservice-k8s-external-provider
* ================================================================================
* Copyright (C) 2020 Nokia. All rights reserved.
* ================================================================================
* 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.
* ============LICENSE_END=========================================================
*/
package x509
import (
"bytes"
"crypto/x509"
"encoding/pem"
"fmt"
)
// decodeCSR decodes a certificate request in PEM format and returns the
func DecodeCSR(data []byte) (*x509.CertificateRequest, error) {
block, rest := pem.Decode(data)
if block == nil || len(rest) > 0 {
return nil, fmt.Errorf("unexpected CSR PEM on sign request")
}
if block.Type != "CERTIFICATE REQUEST" {
return nil, fmt.Errorf("PEM is not a certificate request")
}
csr, err := x509.ParseCertificateRequest(block.Bytes)
if err != nil {
return nil, fmt.Errorf("error parsing certificate request: %v", err)
}
if err := csr.CheckSignature(); err != nil {
return nil, fmt.Errorf("error checking certificate request signature: %v", err)
}
return csr, nil
}
// encodeX509 will encode a *x509.Certificate into PEM format.
func EncodeX509(cert *x509.Certificate) ([]byte, error) {
caPem := bytes.NewBuffer([]byte{})
err := pem.Encode(caPem, &pem.Block{Type: "CERTIFICATE", Bytes: cert.Raw})
if err != nil {
return nil, err
}
return caPem.Bytes(), nil
}
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