/
keyvault_mem.go
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/
keyvault_mem.go
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// Copyright © 2022 The Things Network Foundation, The Things Industries B.V.
//
// 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 cryptoutil
import (
"bytes"
"context"
"crypto/tls"
"encoding/pem"
"strings"
"go.thethings.network/lorawan-stack/v3/pkg/crypto"
)
type memKeyVault struct {
m map[string][]byte
}
// Key implements crypto.KeyVault.
func (kv *memKeyVault) Key(_ context.Context, label string) ([]byte, error) {
key, ok := kv.m[label]
if !ok {
return nil, errKeyNotFound.WithAttributes("label", label)
}
return key, nil
}
func (kv *memKeyVault) certificate(label string) (tls.Certificate, error) {
raw, ok := kv.m[label]
if !ok {
return tls.Certificate{}, errCertificateNotFound.WithAttributes("label", label)
}
certPEMBlock, keyPEMBlock := &bytes.Buffer{}, &bytes.Buffer{}
for {
block, rest := pem.Decode(raw)
if block == nil {
break
}
if block.Type == "CERTIFICATE" {
if err := pem.Encode(certPEMBlock, block); err != nil {
return tls.Certificate{}, err
}
} else if block.Type == "PRIVATE KEY" || strings.HasSuffix(block.Type, " PRIVATE KEY") {
if err := pem.Encode(keyPEMBlock, block); err != nil {
return tls.Certificate{}, err
}
}
raw = rest
}
return tls.X509KeyPair(certPEMBlock.Bytes(), keyPEMBlock.Bytes())
}
// ServerCertificate implements crypto.KeyVault.
func (kv *memKeyVault) ServerCertificate(_ context.Context, label string) (tls.Certificate, error) {
return kv.certificate(label)
}
// ClientCertificate implements crypto.KeyVault.
func (kv *memKeyVault) ClientCertificate(context.Context) (tls.Certificate, error) {
return kv.certificate("client")
}
// NewMemKeyVault returns a crypto.KeyVault that stores keys in memory.
// Certificates must be PEM encoded. The client certificate must be labeled "client".
// The given map must not be modified after calling this function.
func NewMemKeyVault(m map[string][]byte) crypto.KeyVault {
return &memKeyVault{
m: m,
}
}