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refining

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This commit is contained in:
Justin Angel 2022-01-29 13:35:08 -05:00
parent 9e619fc020
commit 5935b13b67
3 changed files with 33 additions and 9 deletions
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19
app.go
View file

@ -646,21 +646,26 @@ func (h *Headscale) getTLSSettings() (*tls.Config, error) {
log.Warn().Msg("Listening with TLS but ServerURL does not start with https://")
}
// Leaving flexibility here to support other authentication modes
// if desired.
var client_auth_mode tls.ClientAuthType
msg := "Client authentication (mTLS) "
if(h.cfg.TLSClientAuthMode == "disabled"){
log.Warn().Msg(msg + "is disabled")
// Client cert is _not_ required.
client_auth_mode = tls.NoClientCert
}else if (h.cfg.TLSClientAuthMode == "relaxed"){
log.Warn().Msg(msg + "is relaxed. Client certs will be required but will not be verified.")
// Client cert required, but not verified.
client_auth_mode = tls.RequireAnyClientCert
}else{
log.Warn().Msg(msg + "is enforced. Disable or relax in the configuration file.")
}else if (h.cfg.TLSClientAuthMode == "enforced"){
// Client cert is required and verified.
client_auth_mode = tls.RequireAndVerifyClientCert
}else{
return nil, errors.New(
"Invalid tls_client_auth_mode provided: " +
h.cfg.TLSClientAuthMode)
}
log.Info().Msg(fmt.Sprintf(
"Client authentication (mTLS) is \"%s\". See the docs to learn about configuring this setting.",
h.cfg.TLSClientAuthMode))
tlsConfig := &tls.Config{
ClientAuth: client_auth_mode,
NextProtos: []string{"http/1.1"},

4
cmd/headscale/cli/utils.go
View file

@ -83,8 +83,8 @@ func LoadConfig(path string) error {
}
auth_mode := viper.GetString("tls_client_auth_mode")
if (auth_mode != "disabled" && auth_mode != "enforced"){
errorText += "Invalid tls_client_auth_mode supplied. Accepted values: disabled, enforced."
if (auth_mode != "disabled" && auth_mode != "relaxed" && auth_mode != "enforced"){
errorText += "Invalid tls_client_auth_mode supplied. Accepted values: disabled, relaxed, enforced."
}
if errorText != "" {

19
docs/tls.md
View file

@ -29,3 +29,22 @@ headscale can also be configured to expose its web service via TLS. To configure
tls_cert_path: ""
tls_key_path: ""
```
### Configuring Mutual TLS Authentication (mTLS)
mTLS is a method by which an HTTPS server authenticates clients, e.g. Tailscale,
using TLS certificates. The capability can be configured by by applying one of
the following values to the `tls_client_auth_mode` setting in the configuration
file.
| Value | Behavior |
| ----- | -------- |
| `disabled` | Disable mTLS (default). |
| `relaxed` | A client certificate is required, but it is not verified. |
| `enforced` | Requires clients to supply a certificate that is verified. |
```yaml
tls_client_auth_mode: ""
```