mirror of
https://github.com/juanfont/headscale.git
synced 2024-11-27 12:05:26 +00:00
574 lines
14 KiB
Go
574 lines
14 KiB
Go
package headscale
|
|
|
|
import (
|
|
"bytes"
|
|
"encoding/json"
|
|
"fmt"
|
|
"html/template"
|
|
"net/http"
|
|
"strings"
|
|
"time"
|
|
|
|
"github.com/gorilla/mux"
|
|
"github.com/rs/zerolog/log"
|
|
"tailscale.com/tailcfg"
|
|
"tailscale.com/types/key"
|
|
)
|
|
|
|
const (
|
|
// TODO(juan): remove this once https://github.com/juanfont/headscale/issues/727 is fixed.
|
|
registrationHoldoff = time.Second * 5
|
|
reservedResponseHeaderSize = 4
|
|
RegisterMethodAuthKey = "authkey"
|
|
RegisterMethodOIDC = "oidc"
|
|
RegisterMethodCLI = "cli"
|
|
ErrRegisterMethodCLIDoesNotSupportExpire = Error(
|
|
"machines registered with CLI does not support expire",
|
|
)
|
|
)
|
|
|
|
func (h *Headscale) HealthHandler(
|
|
writer http.ResponseWriter,
|
|
req *http.Request,
|
|
) {
|
|
respond := func(err error) {
|
|
writer.Header().Set("Content-Type", "application/health+json; charset=utf-8")
|
|
|
|
res := struct {
|
|
Status string `json:"status"`
|
|
}{
|
|
Status: "pass",
|
|
}
|
|
|
|
if err != nil {
|
|
writer.WriteHeader(http.StatusInternalServerError)
|
|
log.Error().Caller().Err(err).Msg("health check failed")
|
|
res.Status = "fail"
|
|
}
|
|
|
|
buf, err := json.Marshal(res)
|
|
if err != nil {
|
|
log.Error().Caller().Err(err).Msg("marshal failed")
|
|
}
|
|
_, err = writer.Write(buf)
|
|
if err != nil {
|
|
log.Error().Caller().Err(err).Msg("write failed")
|
|
}
|
|
}
|
|
|
|
if err := h.pingDB(); err != nil {
|
|
respond(err)
|
|
|
|
return
|
|
}
|
|
|
|
respond(nil)
|
|
}
|
|
|
|
type registerWebAPITemplateConfig struct {
|
|
Key string
|
|
}
|
|
|
|
var registerWebAPITemplate = template.Must(
|
|
template.New("registerweb").Parse(`
|
|
<html>
|
|
<head>
|
|
<title>Registration - Headscale</title>
|
|
</head>
|
|
<body>
|
|
<h1>headscale</h1>
|
|
<h2>Machine registration</h2>
|
|
<p>
|
|
Run the command below in the headscale server to add this machine to your network:
|
|
</p>
|
|
<pre><code>headscale -n NAMESPACE nodes register --key {{.Key}}</code></pre>
|
|
</body>
|
|
</html>
|
|
`))
|
|
|
|
// RegisterWebAPI shows a simple message in the browser to point to the CLI
|
|
// Listens in /register/:nkey.
|
|
//
|
|
// This is not part of the Tailscale control API, as we could send whatever URL
|
|
// in the RegisterResponse.AuthURL field.
|
|
func (h *Headscale) RegisterWebAPI(
|
|
writer http.ResponseWriter,
|
|
req *http.Request,
|
|
) {
|
|
vars := mux.Vars(req)
|
|
nodeKeyStr, ok := vars["nkey"]
|
|
if !ok || nodeKeyStr == "" {
|
|
writer.Header().Set("Content-Type", "text/plain; charset=utf-8")
|
|
writer.WriteHeader(http.StatusBadRequest)
|
|
_, err := writer.Write([]byte("Wrong params"))
|
|
if err != nil {
|
|
log.Error().
|
|
Caller().
|
|
Err(err).
|
|
Msg("Failed to write response")
|
|
}
|
|
|
|
return
|
|
}
|
|
|
|
var content bytes.Buffer
|
|
if err := registerWebAPITemplate.Execute(&content, registerWebAPITemplateConfig{
|
|
Key: nodeKeyStr,
|
|
}); err != nil {
|
|
log.Error().
|
|
Str("func", "RegisterWebAPI").
|
|
Err(err).
|
|
Msg("Could not render register web API template")
|
|
writer.Header().Set("Content-Type", "text/plain; charset=utf-8")
|
|
writer.WriteHeader(http.StatusInternalServerError)
|
|
_, err = writer.Write([]byte("Could not render register web API template"))
|
|
if err != nil {
|
|
log.Error().
|
|
Caller().
|
|
Err(err).
|
|
Msg("Failed to write response")
|
|
}
|
|
|
|
return
|
|
}
|
|
|
|
writer.Header().Set("Content-Type", "text/html; charset=utf-8")
|
|
writer.WriteHeader(http.StatusOK)
|
|
_, err := writer.Write(content.Bytes())
|
|
if err != nil {
|
|
log.Error().
|
|
Caller().
|
|
Err(err).
|
|
Msg("Failed to write response")
|
|
}
|
|
}
|
|
|
|
func (h *Headscale) handleMachineLogOut(
|
|
writer http.ResponseWriter,
|
|
req *http.Request,
|
|
machineKey key.MachinePublic,
|
|
machine Machine,
|
|
) {
|
|
resp := tailcfg.RegisterResponse{}
|
|
|
|
log.Info().
|
|
Str("machine", machine.Hostname).
|
|
Msg("Client requested logout")
|
|
|
|
err := h.ExpireMachine(&machine)
|
|
if err != nil {
|
|
log.Error().
|
|
Caller().
|
|
Str("func", "handleMachineLogOut").
|
|
Err(err).
|
|
Msg("Failed to expire machine")
|
|
http.Error(writer, "Internal server error", http.StatusInternalServerError)
|
|
|
|
return
|
|
}
|
|
|
|
resp.AuthURL = ""
|
|
resp.MachineAuthorized = false
|
|
resp.User = *machine.Namespace.toUser()
|
|
respBody, err := encode(resp, &machineKey, h.privateKey)
|
|
if err != nil {
|
|
log.Error().
|
|
Caller().
|
|
Err(err).
|
|
Msg("Cannot encode message")
|
|
http.Error(writer, "Internal server error", http.StatusInternalServerError)
|
|
|
|
return
|
|
}
|
|
|
|
writer.Header().Set("Content-Type", "application/json; charset=utf-8")
|
|
writer.WriteHeader(http.StatusOK)
|
|
_, err = writer.Write(respBody)
|
|
if err != nil {
|
|
log.Error().
|
|
Caller().
|
|
Err(err).
|
|
Msg("Failed to write response")
|
|
}
|
|
}
|
|
|
|
func (h *Headscale) handleMachineValidRegistration(
|
|
writer http.ResponseWriter,
|
|
req *http.Request,
|
|
machineKey key.MachinePublic,
|
|
machine Machine,
|
|
) {
|
|
resp := tailcfg.RegisterResponse{}
|
|
|
|
// The machine registration is valid, respond with redirect to /map
|
|
log.Debug().
|
|
Str("machine", machine.Hostname).
|
|
Msg("Client is registered and we have the current NodeKey. All clear to /map")
|
|
|
|
resp.AuthURL = ""
|
|
resp.MachineAuthorized = true
|
|
resp.User = *machine.Namespace.toUser()
|
|
resp.Login = *machine.Namespace.toLogin()
|
|
|
|
respBody, err := encode(resp, &machineKey, h.privateKey)
|
|
if err != nil {
|
|
log.Error().
|
|
Caller().
|
|
Err(err).
|
|
Msg("Cannot encode message")
|
|
machineRegistrations.WithLabelValues("update", "web", "error", machine.Namespace.Name).
|
|
Inc()
|
|
http.Error(writer, "Internal server error", http.StatusInternalServerError)
|
|
|
|
return
|
|
}
|
|
machineRegistrations.WithLabelValues("update", "web", "success", machine.Namespace.Name).
|
|
Inc()
|
|
|
|
writer.Header().Set("Content-Type", "application/json; charset=utf-8")
|
|
writer.WriteHeader(http.StatusOK)
|
|
_, err = writer.Write(respBody)
|
|
if err != nil {
|
|
log.Error().
|
|
Caller().
|
|
Err(err).
|
|
Msg("Failed to write response")
|
|
}
|
|
}
|
|
|
|
func (h *Headscale) handleMachineExpired(
|
|
writer http.ResponseWriter,
|
|
req *http.Request,
|
|
machineKey key.MachinePublic,
|
|
registerRequest tailcfg.RegisterRequest,
|
|
machine Machine,
|
|
) {
|
|
resp := tailcfg.RegisterResponse{}
|
|
|
|
// The client has registered before, but has expired
|
|
log.Debug().
|
|
Str("machine", machine.Hostname).
|
|
Msg("Machine registration has expired. Sending a authurl to register")
|
|
|
|
if registerRequest.Auth.AuthKey != "" {
|
|
h.handleAuthKey(writer, req, machineKey, registerRequest)
|
|
|
|
return
|
|
}
|
|
|
|
if h.cfg.OIDC.Issuer != "" {
|
|
resp.AuthURL = fmt.Sprintf("%s/oidc/register/%s",
|
|
strings.TrimSuffix(h.cfg.ServerURL, "/"),
|
|
NodePublicKeyStripPrefix(registerRequest.NodeKey))
|
|
} else {
|
|
resp.AuthURL = fmt.Sprintf("%s/register/%s",
|
|
strings.TrimSuffix(h.cfg.ServerURL, "/"),
|
|
NodePublicKeyStripPrefix(registerRequest.NodeKey))
|
|
}
|
|
|
|
respBody, err := encode(resp, &machineKey, h.privateKey)
|
|
if err != nil {
|
|
log.Error().
|
|
Caller().
|
|
Err(err).
|
|
Msg("Cannot encode message")
|
|
machineRegistrations.WithLabelValues("reauth", "web", "error", machine.Namespace.Name).
|
|
Inc()
|
|
http.Error(writer, "Internal server error", http.StatusInternalServerError)
|
|
|
|
return
|
|
}
|
|
machineRegistrations.WithLabelValues("reauth", "web", "success", machine.Namespace.Name).
|
|
Inc()
|
|
|
|
writer.Header().Set("Content-Type", "application/json; charset=utf-8")
|
|
writer.WriteHeader(http.StatusOK)
|
|
_, err = writer.Write(respBody)
|
|
if err != nil {
|
|
log.Error().
|
|
Caller().
|
|
Err(err).
|
|
Msg("Failed to write response")
|
|
}
|
|
}
|
|
|
|
func (h *Headscale) handleMachineRefreshKey(
|
|
writer http.ResponseWriter,
|
|
req *http.Request,
|
|
machineKey key.MachinePublic,
|
|
registerRequest tailcfg.RegisterRequest,
|
|
machine Machine,
|
|
) {
|
|
resp := tailcfg.RegisterResponse{}
|
|
|
|
log.Debug().
|
|
Str("machine", machine.Hostname).
|
|
Msg("We have the OldNodeKey in the database. This is a key refresh")
|
|
machine.NodeKey = NodePublicKeyStripPrefix(registerRequest.NodeKey)
|
|
|
|
if err := h.db.Save(&machine).Error; err != nil {
|
|
log.Error().
|
|
Caller().
|
|
Err(err).
|
|
Msg("Failed to update machine key in the database")
|
|
http.Error(writer, "Internal server error", http.StatusInternalServerError)
|
|
|
|
return
|
|
}
|
|
|
|
resp.AuthURL = ""
|
|
resp.User = *machine.Namespace.toUser()
|
|
respBody, err := encode(resp, &machineKey, h.privateKey)
|
|
if err != nil {
|
|
log.Error().
|
|
Caller().
|
|
Err(err).
|
|
Msg("Cannot encode message")
|
|
http.Error(writer, "Internal server error", http.StatusInternalServerError)
|
|
|
|
return
|
|
}
|
|
|
|
writer.Header().Set("Content-Type", "application/json; charset=utf-8")
|
|
writer.WriteHeader(http.StatusOK)
|
|
_, err = writer.Write(respBody)
|
|
if err != nil {
|
|
log.Error().
|
|
Caller().
|
|
Err(err).
|
|
Msg("Failed to write response")
|
|
}
|
|
}
|
|
|
|
func (h *Headscale) handleMachineRegistrationNew(
|
|
writer http.ResponseWriter,
|
|
req *http.Request,
|
|
machineKey key.MachinePublic,
|
|
registerRequest tailcfg.RegisterRequest,
|
|
) {
|
|
resp := tailcfg.RegisterResponse{}
|
|
|
|
// The machine registration is new, redirect the client to the registration URL
|
|
log.Debug().
|
|
Caller().
|
|
Str("machine", registerRequest.Hostinfo.Hostname).
|
|
Msg("The node seems to be new, sending auth url")
|
|
if h.cfg.OIDC.Issuer != "" {
|
|
resp.AuthURL = fmt.Sprintf(
|
|
"%s/oidc/register/%s",
|
|
strings.TrimSuffix(h.cfg.ServerURL, "/"),
|
|
NodePublicKeyStripPrefix(registerRequest.NodeKey),
|
|
)
|
|
} else {
|
|
resp.AuthURL = fmt.Sprintf("%s/register/%s",
|
|
strings.TrimSuffix(h.cfg.ServerURL, "/"),
|
|
NodePublicKeyStripPrefix(registerRequest.NodeKey))
|
|
}
|
|
|
|
respBody, err := encode(resp, &machineKey, h.privateKey)
|
|
if err != nil {
|
|
log.Error().
|
|
Caller().
|
|
Err(err).
|
|
Msg("Cannot encode message")
|
|
http.Error(writer, "Internal server error", http.StatusInternalServerError)
|
|
|
|
return
|
|
}
|
|
|
|
writer.Header().Set("Content-Type", "application/json; charset=utf-8")
|
|
writer.WriteHeader(http.StatusOK)
|
|
_, err = writer.Write(respBody)
|
|
if err != nil {
|
|
log.Error().
|
|
Caller().
|
|
Err(err).
|
|
Msg("Failed to write response")
|
|
}
|
|
}
|
|
|
|
// TODO: check if any locks are needed around IP allocation.
|
|
func (h *Headscale) handleAuthKey(
|
|
writer http.ResponseWriter,
|
|
req *http.Request,
|
|
machineKey key.MachinePublic,
|
|
registerRequest tailcfg.RegisterRequest,
|
|
) {
|
|
machineKeyStr := MachinePublicKeyStripPrefix(machineKey)
|
|
|
|
log.Debug().
|
|
Str("func", "handleAuthKey").
|
|
Str("machine", registerRequest.Hostinfo.Hostname).
|
|
Msgf("Processing auth key for %s", registerRequest.Hostinfo.Hostname)
|
|
resp := tailcfg.RegisterResponse{}
|
|
|
|
pak, err := h.checkKeyValidity(registerRequest.Auth.AuthKey)
|
|
if err != nil {
|
|
log.Error().
|
|
Caller().
|
|
Str("func", "handleAuthKey").
|
|
Str("machine", registerRequest.Hostinfo.Hostname).
|
|
Err(err).
|
|
Msg("Failed authentication via AuthKey")
|
|
resp.MachineAuthorized = false
|
|
respBody, err := encode(resp, &machineKey, h.privateKey)
|
|
if err != nil {
|
|
log.Error().
|
|
Caller().
|
|
Str("func", "handleAuthKey").
|
|
Str("machine", registerRequest.Hostinfo.Hostname).
|
|
Err(err).
|
|
Msg("Cannot encode message")
|
|
http.Error(writer, "Internal server error", http.StatusInternalServerError)
|
|
machineRegistrations.WithLabelValues("new", RegisterMethodAuthKey, "error", pak.Namespace.Name).
|
|
Inc()
|
|
|
|
return
|
|
}
|
|
|
|
writer.Header().Set("Content-Type", "application/json; charset=utf-8")
|
|
writer.WriteHeader(http.StatusUnauthorized)
|
|
_, err = writer.Write(respBody)
|
|
if err != nil {
|
|
log.Error().
|
|
Caller().
|
|
Err(err).
|
|
Msg("Failed to write response")
|
|
}
|
|
|
|
log.Error().
|
|
Caller().
|
|
Str("func", "handleAuthKey").
|
|
Str("machine", registerRequest.Hostinfo.Hostname).
|
|
Msg("Failed authentication via AuthKey")
|
|
|
|
if pak != nil {
|
|
machineRegistrations.WithLabelValues("new", RegisterMethodAuthKey, "error", pak.Namespace.Name).
|
|
Inc()
|
|
} else {
|
|
machineRegistrations.WithLabelValues("new", RegisterMethodAuthKey, "error", "unknown").Inc()
|
|
}
|
|
|
|
return
|
|
}
|
|
|
|
log.Debug().
|
|
Str("func", "handleAuthKey").
|
|
Str("machine", registerRequest.Hostinfo.Hostname).
|
|
Msg("Authentication key was valid, proceeding to acquire IP addresses")
|
|
|
|
nodeKey := NodePublicKeyStripPrefix(registerRequest.NodeKey)
|
|
|
|
// retrieve machine information if it exist
|
|
// The error is not important, because if it does not
|
|
// exist, then this is a new machine and we will move
|
|
// on to registration.
|
|
machine, _ := h.GetMachineByMachineKey(machineKey)
|
|
if machine != nil {
|
|
log.Trace().
|
|
Caller().
|
|
Str("machine", machine.Hostname).
|
|
Msg("machine already registered, refreshing with new auth key")
|
|
|
|
machine.NodeKey = nodeKey
|
|
machine.AuthKeyID = uint(pak.ID)
|
|
err := h.RefreshMachine(machine, registerRequest.Expiry)
|
|
if err != nil {
|
|
log.Error().
|
|
Caller().
|
|
Str("machine", machine.Hostname).
|
|
Err(err).
|
|
Msg("Failed to refresh machine")
|
|
|
|
return
|
|
}
|
|
} else {
|
|
now := time.Now().UTC()
|
|
|
|
givenName, err := h.GenerateGivenName(registerRequest.Hostinfo.Hostname)
|
|
if err != nil {
|
|
log.Error().
|
|
Caller().
|
|
Str("func", "RegistrationHandler").
|
|
Str("hostinfo.name", registerRequest.Hostinfo.Hostname).
|
|
Err(err)
|
|
|
|
return
|
|
}
|
|
|
|
machineToRegister := Machine{
|
|
Hostname: registerRequest.Hostinfo.Hostname,
|
|
GivenName: givenName,
|
|
NamespaceID: pak.Namespace.ID,
|
|
MachineKey: machineKeyStr,
|
|
RegisterMethod: RegisterMethodAuthKey,
|
|
Expiry: ®isterRequest.Expiry,
|
|
NodeKey: nodeKey,
|
|
LastSeen: &now,
|
|
AuthKeyID: uint(pak.ID),
|
|
}
|
|
|
|
machine, err = h.RegisterMachine(
|
|
machineToRegister,
|
|
)
|
|
if err != nil {
|
|
log.Error().
|
|
Caller().
|
|
Err(err).
|
|
Msg("could not register machine")
|
|
machineRegistrations.WithLabelValues("new", RegisterMethodAuthKey, "error", pak.Namespace.Name).
|
|
Inc()
|
|
http.Error(writer, "Internal server error", http.StatusInternalServerError)
|
|
|
|
return
|
|
}
|
|
}
|
|
|
|
err = h.UsePreAuthKey(pak)
|
|
if err != nil {
|
|
log.Error().
|
|
Caller().
|
|
Err(err).
|
|
Msg("Failed to use pre-auth key")
|
|
machineRegistrations.WithLabelValues("new", RegisterMethodAuthKey, "error", pak.Namespace.Name).
|
|
Inc()
|
|
http.Error(writer, "Internal server error", http.StatusInternalServerError)
|
|
|
|
return
|
|
}
|
|
|
|
resp.MachineAuthorized = true
|
|
resp.User = *pak.Namespace.toUser()
|
|
respBody, err := encode(resp, &machineKey, h.privateKey)
|
|
if err != nil {
|
|
log.Error().
|
|
Caller().
|
|
Str("func", "handleAuthKey").
|
|
Str("machine", registerRequest.Hostinfo.Hostname).
|
|
Err(err).
|
|
Msg("Cannot encode message")
|
|
machineRegistrations.WithLabelValues("new", RegisterMethodAuthKey, "error", pak.Namespace.Name).
|
|
Inc()
|
|
http.Error(writer, "Internal server error", http.StatusInternalServerError)
|
|
|
|
return
|
|
}
|
|
machineRegistrations.WithLabelValues("new", RegisterMethodAuthKey, "success", pak.Namespace.Name).
|
|
Inc()
|
|
writer.Header().Set("Content-Type", "application/json; charset=utf-8")
|
|
writer.WriteHeader(http.StatusOK)
|
|
_, err = writer.Write(respBody)
|
|
if err != nil {
|
|
log.Error().
|
|
Caller().
|
|
Err(err).
|
|
Msg("Failed to write response")
|
|
}
|
|
|
|
log.Info().
|
|
Str("func", "handleAuthKey").
|
|
Str("machine", registerRequest.Hostinfo.Hostname).
|
|
Str("ips", strings.Join(machine.IPAddresses.ToStringSlice(), ", ")).
|
|
Msg("Successfully authenticated via AuthKey")
|
|
}
|