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load.go
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load.go
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// Copyright 2018 Istio Authors
//
// 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 creds
import (
"crypto/tls"
"crypto/x509"
"errors"
"fmt"
)
// loadCertPair from the given set of files.
func loadCertPair(certFile, keyFile string) (tls.Certificate, error) {
certPEMBlock, err := readFile(certFile)
if err != nil {
return tls.Certificate{}, err
}
keyPEMBlock, err := readFile(keyFile)
if err != nil {
return tls.Certificate{}, err
}
cert, err := tls.X509KeyPair(certPEMBlock, keyPEMBlock)
if err != nil {
err = fmt.Errorf("error loading client certificate files (%s, %s): %v", certFile, keyFile, err)
}
return cert, err
}
// loadCACert, create a certPool and return.
func loadCACert(caCertFile string) (*x509.CertPool, error) {
certPool := x509.NewCertPool()
ca, err := readFile(caCertFile)
if err != nil {
err = fmt.Errorf("error loading CA certificate file (%s): %v", caCertFile, err)
return nil, err
}
if ok := certPool.AppendCertsFromPEM(ca); !ok {
err = errors.New("failed to append loaded CA certificate to the certificate pool")
return nil, err
}
return certPool, nil
}