126 lines
3.0 KiB
Go
126 lines
3.0 KiB
Go
package server
|
|
|
|
import (
|
|
// We must import sha512 so that it registers with the runtime so that
|
|
// certificates that use it can be parsed.
|
|
_ "crypto/sha512"
|
|
"crypto/tls"
|
|
"fmt"
|
|
"net"
|
|
"strconv"
|
|
"sync"
|
|
|
|
"github.com/hashicorp/vault/vault"
|
|
)
|
|
|
|
// ListenerFactory is the factory function to create a listener.
|
|
type ListenerFactory func(map[string]string) (net.Listener, map[string]string, vault.ReloadFunc, error)
|
|
|
|
// BuiltinListeners is the list of built-in listener types.
|
|
var BuiltinListeners = map[string]ListenerFactory{
|
|
"tcp": tcpListenerFactory,
|
|
}
|
|
|
|
// tlsLookup maps the tls_min_version configuration to the internal value
|
|
var tlsLookup = map[string]uint16{
|
|
"tls10": tls.VersionTLS10,
|
|
"tls11": tls.VersionTLS11,
|
|
"tls12": tls.VersionTLS12,
|
|
}
|
|
|
|
// NewListener creates a new listener of the given type with the given
|
|
// configuration. The type is looked up in the BuiltinListeners map.
|
|
func NewListener(t string, config map[string]string) (net.Listener, map[string]string, vault.ReloadFunc, error) {
|
|
f, ok := BuiltinListeners[t]
|
|
if !ok {
|
|
return nil, nil, nil, fmt.Errorf("unknown listener type: %s", t)
|
|
}
|
|
|
|
return f(config)
|
|
}
|
|
|
|
func listenerWrapTLS(
|
|
ln net.Listener,
|
|
props map[string]string,
|
|
config map[string]string) (net.Listener, map[string]string, vault.ReloadFunc, error) {
|
|
props["tls"] = "disabled"
|
|
|
|
if v, ok := config["tls_disable"]; ok {
|
|
disabled, err := strconv.ParseBool(v)
|
|
if err != nil {
|
|
return nil, nil, nil, fmt.Errorf("invalid value for 'tls_disable': %v", err)
|
|
}
|
|
if disabled {
|
|
return ln, props, nil, nil
|
|
}
|
|
}
|
|
|
|
_, ok := config["tls_cert_file"]
|
|
if !ok {
|
|
return nil, nil, nil, fmt.Errorf("'tls_cert_file' must be set")
|
|
}
|
|
|
|
_, ok = config["tls_key_file"]
|
|
if !ok {
|
|
return nil, nil, nil, fmt.Errorf("'tls_key_file' must be set")
|
|
}
|
|
|
|
cg := &certificateGetter{
|
|
config: config,
|
|
}
|
|
|
|
if err := cg.reload(nil); err != nil {
|
|
return nil, nil, nil, fmt.Errorf("error loading TLS cert: %s", err)
|
|
}
|
|
|
|
tlsvers, ok := config["tls_min_version"]
|
|
if !ok {
|
|
tlsvers = "tls12"
|
|
}
|
|
|
|
tlsConf := &tls.Config{}
|
|
tlsConf.GetCertificate = cg.getCertificate
|
|
tlsConf.NextProtos = []string{"http/1.1"}
|
|
tlsConf.MinVersion, ok = tlsLookup[tlsvers]
|
|
if !ok {
|
|
return nil, nil, nil, fmt.Errorf("'tls_min_version' value %s not supported, please specify one of [tls10,tls11,tls12]", tlsvers)
|
|
}
|
|
tlsConf.ClientAuth = tls.RequestClientCert
|
|
|
|
ln = tls.NewListener(ln, tlsConf)
|
|
props["tls"] = "enabled"
|
|
return ln, props, cg.reload, nil
|
|
}
|
|
|
|
type certificateGetter struct {
|
|
sync.RWMutex
|
|
|
|
config map[string]string
|
|
cert *tls.Certificate
|
|
}
|
|
|
|
func (cg *certificateGetter) reload(map[string]interface{}) error {
|
|
cert, err := tls.LoadX509KeyPair(cg.config["tls_cert_file"], cg.config["tls_key_file"])
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
cg.Lock()
|
|
defer cg.Unlock()
|
|
|
|
cg.cert = &cert
|
|
|
|
return nil
|
|
}
|
|
|
|
func (cg *certificateGetter) getCertificate(clientHello *tls.ClientHelloInfo) (*tls.Certificate, error) {
|
|
cg.RLock()
|
|
defer cg.RUnlock()
|
|
|
|
if cg.cert == nil {
|
|
return nil, fmt.Errorf("nil certificate")
|
|
}
|
|
|
|
return cg.cert, nil
|
|
}
|