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load-tls.go
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load-tls.go
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// Copyright (c) 2023, Roel Schut. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package easytls
import (
"crypto/tls"
"github.com/go-pogo/errors"
)
var (
_ TLSCertificateLoader = (*KeyPair)(nil)
_ Option = (*KeyPair)(nil)
)
// KeyPair contains the paths to PEM encoded certificate and key pair of files,
// which can be loaded using [KeyPair.LoadTLSCertificate].
type KeyPair struct {
CertFile string
KeyFile string
}
func (kp KeyPair) IsEmpty() bool {
return kp.CertFile == "" && kp.KeyFile == ""
}
// LoadTLSCertificate reads and parses the key pair files with
// [tls.LoadX509KeyPair]. The files must contain valid PEM encoded data.
func (kp KeyPair) LoadTLSCertificate() (*tls.Certificate, error) {
if kp.IsEmpty() {
return nil, nil
}
c, err := tls.LoadX509KeyPair(kp.CertFile, kp.KeyFile)
return &c, errors.Wrap(err, ErrLoadCertificate)
}
// ApplyTo adds the [KeyPair] certificate to the provided [tls.Config].
func (kp KeyPair) ApplyTo(conf *tls.Config, target Target) error {
if conf == nil || kp.IsEmpty() {
return nil
}
if conf.GetCertificate == nil && target == TargetServer {
conf.GetCertificate = GetCertificate(kp)
return nil
}
var err error
conf.Certificates, err = loadAndAppend(conf.Certificates, kp)
return err
}
var (
_ TLSCertificateLoader = (*PEMBlocks)(nil)
_ Option = (*PEMBlocks)(nil)
)
// PEMBlocks contains PEM encoded certificate and key data which can be loaded
// using [KeyPair.LoadTLSCertificate].
type PEMBlocks struct {
Cert []byte
Key []byte
}
func (pb PEMBlocks) IsEmpty() bool {
return len(pb.Cert) == 0 && len(pb.Key) == 0
}
// LoadTLSCertificate parses the [PEMBlocks.Cert] and [PEMBlocks.Key] blocks
// using [tls.X509KeyPair]. The []byte values must contain valid PEM encoded
// data.
func (pb PEMBlocks) LoadTLSCertificate() (*tls.Certificate, error) {
if pb.IsEmpty() {
return nil, nil
}
c, err := tls.X509KeyPair(pb.Cert, pb.Key)
return &c, errors.Wrap(err, ErrLoadCertificate)
}
// ApplyTo adds the [PEMBlocks] certificates to the provided [tls.Config].
func (pb PEMBlocks) ApplyTo(conf *tls.Config, _ Target) error {
if conf == nil {
return nil
}
var err error
conf.Certificates, err = loadAndAppend(conf.Certificates, pb)
return err
}