forked from johnjohnsp1/capsule8
/
validate.go
73 lines (66 loc) · 2.11 KB
/
validate.go
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// Copyright 2017 Capsule8, Inc.
//
// 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 config
import (
"crypto/x509"
"encoding/pem"
"fmt"
"io/ioutil"
"github.com/golang/glog"
)
// ValidateTLSConfig validates the TLS credentials from their
// configured paths if the UseTLS variable is true.
func ValidateTLSConfig() error {
if Sensor.UseTLS {
crt, err := ioutil.ReadFile(Sensor.TLSServerCertPath)
if err != nil {
return fmt.Errorf("could not read sensor certificate: %s", err)
}
crtBlock, _ := pem.Decode(crt)
if crtBlock == nil {
return fmt.Errorf("failed to decode sensor certificate PEM")
}
_, err = x509.ParseCertificate(crtBlock.Bytes)
if err != nil {
return fmt.Errorf("error parsing sensor certificate: %s", err)
}
key, err := ioutil.ReadFile(Sensor.TLSServerKeyPath)
if err != nil {
return fmt.Errorf("could not read sensor key: %s", err)
}
keyBlock, _ := pem.Decode(key)
if keyBlock == nil {
return fmt.Errorf("failed to decode sensor key PEM")
}
_, err = x509.ParsePKCS1PrivateKey(keyBlock.Bytes)
if err != nil {
return fmt.Errorf("error parsing sensor key: %s", err)
}
ca, err := ioutil.ReadFile(Sensor.TLSCACertPath)
if err != nil {
return fmt.Errorf("could not read ca certificate: %s", err)
}
caBlock, _ := pem.Decode(ca)
if caBlock == nil {
return fmt.Errorf("failed to decode certificate authority PEM")
}
_, err = x509.ParseCertificate(caBlock.Bytes)
if err != nil {
return fmt.Errorf("error parsing certificate authority: %s", err)
}
return nil
}
glog.V(1).Infoln("UseTLS set to false, TLS credentials will not be used")
return nil
}