973 lines
26 KiB
Go
973 lines
26 KiB
Go
package headscale
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import (
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"bytes"
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"encoding/binary"
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"encoding/json"
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"errors"
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"fmt"
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"html/template"
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"io"
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"net/http"
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"strconv"
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"strings"
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"time"
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"github.com/gorilla/mux"
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"github.com/klauspost/compress/zstd"
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"github.com/rs/zerolog/log"
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"gorm.io/gorm"
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"tailscale.com/tailcfg"
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"tailscale.com/types/key"
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)
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const (
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// TODO(juan): remove this once https://github.com/juanfont/headscale/issues/727 is fixed.
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registrationHoldoff = time.Second * 5
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reservedResponseHeaderSize = 4
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RegisterMethodAuthKey = "authkey"
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RegisterMethodOIDC = "oidc"
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RegisterMethodCLI = "cli"
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ErrRegisterMethodCLIDoesNotSupportExpire = Error(
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"machines registered with CLI does not support expire",
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)
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// The CapabilityVersion is used by Tailscale clients to indicate
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// their codebase version. Tailscale clients can communicate over TS2021
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// from CapabilityVersion 28.
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// See https://github.com/tailscale/tailscale/blob/main/tailcfg/tailcfg.go
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NoiseCapabilityVersion = 28
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)
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func (h *Headscale) HealthHandler(
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writer http.ResponseWriter,
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req *http.Request,
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) {
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respond := func(err error) {
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writer.Header().Set("Content-Type", "application/health+json; charset=utf-8")
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res := struct {
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Status string `json:"status"`
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}{
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Status: "pass",
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}
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if err != nil {
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writer.WriteHeader(http.StatusInternalServerError)
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log.Error().Caller().Err(err).Msg("health check failed")
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res.Status = "fail"
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}
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buf, err := json.Marshal(res)
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if err != nil {
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log.Error().Caller().Err(err).Msg("marshal failed")
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}
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_, err = writer.Write(buf)
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if err != nil {
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log.Error().Caller().Err(err).Msg("write failed")
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}
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}
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if err := h.pingDB(); err != nil {
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respond(err)
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return
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}
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respond(nil)
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}
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// KeyHandler provides the Headscale pub key
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// Listens in /key.
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func (h *Headscale) KeyHandler(
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writer http.ResponseWriter,
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req *http.Request,
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) {
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// New Tailscale clients send a 'v' parameter to indicate the CurrentCapabilityVersion
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clientCapabilityStr := req.URL.Query().Get("v")
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if clientCapabilityStr != "" {
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clientCapabilityVersion, err := strconv.Atoi(clientCapabilityStr)
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if err != nil {
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writer.Header().Set("Content-Type", "text/plain; charset=utf-8")
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writer.WriteHeader(http.StatusBadRequest)
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_, err := writer.Write([]byte("Wrong params"))
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if err != nil {
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log.Error().
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Caller().
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Err(err).
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Msg("Failed to write response")
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}
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return
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}
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if clientCapabilityVersion >= NoiseCapabilityVersion {
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// Tailscale has a different key for the TS2021 protocol
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resp := tailcfg.OverTLSPublicKeyResponse{
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LegacyPublicKey: h.privateKey.Public(),
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PublicKey: h.noisePrivateKey.Public(),
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}
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writer.Header().Set("Content-Type", "application/json")
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writer.WriteHeader(http.StatusOK)
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err = json.NewEncoder(writer).Encode(resp)
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if err != nil {
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log.Error().
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Caller().
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Err(err).
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Msg("Failed to write response")
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}
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return
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}
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}
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// Old clients don't send a 'v' parameter, so we send the legacy public key
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writer.Header().Set("Content-Type", "text/plain; charset=utf-8")
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writer.WriteHeader(http.StatusOK)
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_, err := writer.Write([]byte(MachinePublicKeyStripPrefix(h.privateKey.Public())))
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if err != nil {
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log.Error().
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Caller().
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Err(err).
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Msg("Failed to write response")
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}
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}
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type registerWebAPITemplateConfig struct {
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Key string
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}
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var registerWebAPITemplate = template.Must(
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template.New("registerweb").Parse(`
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<html>
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<head>
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<title>Registration - Headscale</title>
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</head>
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<body>
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<h1>headscale</h1>
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<h2>Machine registration</h2>
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<p>
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Run the command below in the headscale server to add this machine to your network:
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</p>
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<pre><code>headscale -n NAMESPACE nodes register --key {{.Key}}</code></pre>
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</body>
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</html>
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`))
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// RegisterWebAPI shows a simple message in the browser to point to the CLI
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// Listens in /register/:nkey.
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//
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// This is not part of the Tailscale control API, as we could send whatever URL
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// in the RegisterResponse.AuthURL field.
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func (h *Headscale) RegisterWebAPI(
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writer http.ResponseWriter,
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req *http.Request,
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) {
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vars := mux.Vars(req)
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nodeKeyStr, ok := vars["nkey"]
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if !ok || nodeKeyStr == "" {
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writer.Header().Set("Content-Type", "text/plain; charset=utf-8")
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writer.WriteHeader(http.StatusBadRequest)
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_, err := writer.Write([]byte("Wrong params"))
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if err != nil {
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log.Error().
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Caller().
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Err(err).
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Msg("Failed to write response")
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}
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return
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}
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var content bytes.Buffer
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if err := registerWebAPITemplate.Execute(&content, registerWebAPITemplateConfig{
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Key: nodeKeyStr,
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}); err != nil {
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log.Error().
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Str("func", "RegisterWebAPI").
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Err(err).
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Msg("Could not render register web API template")
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writer.Header().Set("Content-Type", "text/plain; charset=utf-8")
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writer.WriteHeader(http.StatusInternalServerError)
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_, err = writer.Write([]byte("Could not render register web API template"))
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if err != nil {
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log.Error().
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Caller().
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Err(err).
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Msg("Failed to write response")
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}
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return
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}
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writer.Header().Set("Content-Type", "text/html; charset=utf-8")
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writer.WriteHeader(http.StatusOK)
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_, err := writer.Write(content.Bytes())
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if err != nil {
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log.Error().
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Caller().
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Err(err).
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Msg("Failed to write response")
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}
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}
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// RegistrationHandler handles the actual registration process of a machine
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// Endpoint /machine/:mkey.
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func (h *Headscale) RegistrationHandler(
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writer http.ResponseWriter,
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req *http.Request,
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) {
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vars := mux.Vars(req)
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machineKeyStr, ok := vars["mkey"]
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if !ok || machineKeyStr == "" {
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log.Error().
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Str("handler", "RegistrationHandler").
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Msg("No machine ID in request")
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http.Error(writer, "No machine ID in request", http.StatusBadRequest)
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return
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}
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body, _ := io.ReadAll(req.Body)
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var machineKey key.MachinePublic
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err := machineKey.UnmarshalText([]byte(MachinePublicKeyEnsurePrefix(machineKeyStr)))
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if err != nil {
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log.Error().
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Caller().
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Err(err).
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Msg("Cannot parse machine key")
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machineRegistrations.WithLabelValues("unknown", "web", "error", "unknown").Inc()
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http.Error(writer, "Cannot parse machine key", http.StatusBadRequest)
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return
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}
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registerRequest := tailcfg.RegisterRequest{}
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err = decode(body, ®isterRequest, &machineKey, h.privateKey)
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if err != nil {
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log.Error().
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Caller().
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Err(err).
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Msg("Cannot decode message")
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machineRegistrations.WithLabelValues("unknown", "web", "error", "unknown").Inc()
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http.Error(writer, "Cannot decode message", http.StatusBadRequest)
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return
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}
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now := time.Now().UTC()
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machine, err := h.GetMachineByMachineKey(machineKey)
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if errors.Is(err, gorm.ErrRecordNotFound) {
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machineKeyStr := MachinePublicKeyStripPrefix(machineKey)
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// If the machine has AuthKey set, handle registration via PreAuthKeys
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if registerRequest.Auth.AuthKey != "" {
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h.handleAuthKey(writer, req, machineKey, registerRequest)
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return
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}
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// Check if the node is waiting for interactive login.
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//
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// TODO(juan): We could use this field to improve our protocol implementation,
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// and hold the request until the client closes it, or the interactive
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// login is completed (i.e., the user registers the machine).
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// This is not implemented yet, as it is no strictly required. The only side-effect
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// is that the client will hammer headscale with requests until it gets a
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// successful RegisterResponse.
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if registerRequest.Followup != "" {
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if _, ok := h.registrationCache.Get(NodePublicKeyStripPrefix(registerRequest.NodeKey)); ok {
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log.Debug().
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Caller().
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Str("machine", registerRequest.Hostinfo.Hostname).
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Str("node_key", registerRequest.NodeKey.ShortString()).
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Str("node_key_old", registerRequest.OldNodeKey.ShortString()).
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Str("follow_up", registerRequest.Followup).
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Msg("Machine is waiting for interactive login")
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ticker := time.NewTicker(registrationHoldoff)
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select {
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case <-req.Context().Done():
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return
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case <-ticker.C:
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h.handleMachineRegistrationNew(writer, req, machineKey, registerRequest)
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return
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}
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}
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}
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log.Info().
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Caller().
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Str("machine", registerRequest.Hostinfo.Hostname).
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Str("node_key", registerRequest.NodeKey.ShortString()).
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Str("node_key_old", registerRequest.OldNodeKey.ShortString()).
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Str("follow_up", registerRequest.Followup).
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Msg("New machine not yet in the database")
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givenName, err := h.GenerateGivenName(registerRequest.Hostinfo.Hostname)
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if err != nil {
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log.Error().
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Caller().
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Str("func", "RegistrationHandler").
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Str("hostinfo.name", registerRequest.Hostinfo.Hostname).
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Err(err)
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return
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}
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// The machine did not have a key to authenticate, which means
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// that we rely on a method that calls back some how (OpenID or CLI)
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// We create the machine and then keep it around until a callback
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// happens
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newMachine := Machine{
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MachineKey: machineKeyStr,
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Hostname: registerRequest.Hostinfo.Hostname,
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GivenName: givenName,
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NodeKey: NodePublicKeyStripPrefix(registerRequest.NodeKey),
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LastSeen: &now,
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Expiry: &time.Time{},
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}
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if !registerRequest.Expiry.IsZero() {
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log.Trace().
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Caller().
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Str("machine", registerRequest.Hostinfo.Hostname).
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Time("expiry", registerRequest.Expiry).
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Msg("Non-zero expiry time requested")
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newMachine.Expiry = ®isterRequest.Expiry
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}
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h.registrationCache.Set(
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newMachine.NodeKey,
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newMachine,
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registerCacheExpiration,
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)
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h.handleMachineRegistrationNew(writer, req, machineKey, registerRequest)
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return
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}
|
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|
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// The machine is already registered, so we need to pass through reauth or key update.
|
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if machine != nil {
|
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// If the NodeKey stored in headscale is the same as the key presented in a registration
|
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// request, then we have a node that is either:
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// - Trying to log out (sending a expiry in the past)
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// - A valid, registered machine, looking for the node map
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// - Expired machine wanting to reauthenticate
|
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if machine.NodeKey == NodePublicKeyStripPrefix(registerRequest.NodeKey) {
|
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// The client sends an Expiry in the past if the client is requesting to expire the key (aka logout)
|
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// https://github.com/tailscale/tailscale/blob/main/tailcfg/tailcfg.go#L648
|
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if !registerRequest.Expiry.IsZero() &&
|
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registerRequest.Expiry.UTC().Before(now) {
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h.handleMachineLogOut(writer, req, machineKey, *machine)
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return
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}
|
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|
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// If machine is not expired, and is register, we have a already accepted this machine,
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// let it proceed with a valid registration
|
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if !machine.isExpired() {
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h.handleMachineValidRegistration(writer, req, machineKey, *machine)
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|
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return
|
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}
|
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}
|
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|
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// The NodeKey we have matches OldNodeKey, which means this is a refresh after a key expiration
|
|
if machine.NodeKey == NodePublicKeyStripPrefix(registerRequest.OldNodeKey) &&
|
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!machine.isExpired() {
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h.handleMachineRefreshKey(
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writer,
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req,
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machineKey,
|
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registerRequest,
|
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*machine,
|
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)
|
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return
|
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}
|
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|
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// The machine has expired
|
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h.handleMachineExpired(writer, req, machineKey, registerRequest, *machine)
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|
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return
|
|
}
|
|
}
|
|
|
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func (h *Headscale) getLegacyMapResponseData(
|
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machineKey key.MachinePublic,
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mapRequest tailcfg.MapRequest,
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machine *Machine,
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) ([]byte, error) {
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resp, err := h.generateMapResponse(mapRequest, machine)
|
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if err != nil {
|
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return nil, err
|
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}
|
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var respBody []byte
|
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if mapRequest.Compress == "zstd" {
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src, err := json.Marshal(resp)
|
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if err != nil {
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log.Error().
|
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Caller().
|
|
Str("func", "getMapResponse").
|
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Err(err).
|
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Msg("Failed to marshal response for the client")
|
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|
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return nil, err
|
|
}
|
|
|
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encoder, _ := zstd.NewWriter(nil)
|
|
srcCompressed := encoder.EncodeAll(src, nil)
|
|
respBody = h.privateKey.SealTo(machineKey, srcCompressed)
|
|
} else {
|
|
respBody, err = encode(resp, &machineKey, h.privateKey)
|
|
if err != nil {
|
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return nil, err
|
|
}
|
|
}
|
|
// declare the incoming size on the first 4 bytes
|
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data := make([]byte, reservedResponseHeaderSize)
|
|
binary.LittleEndian.PutUint32(data, uint32(len(respBody)))
|
|
data = append(data, respBody...)
|
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|
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return data, nil
|
|
}
|
|
|
|
func (h *Headscale) generateMapResponse(
|
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mapRequest tailcfg.MapRequest,
|
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machine *Machine,
|
|
) (*tailcfg.MapResponse, error) {
|
|
log.Trace().
|
|
Str("func", "generateMapResponse").
|
|
Str("machine", mapRequest.Hostinfo.Hostname).
|
|
Msg("Creating Map response")
|
|
node, err := machine.toNode(h.cfg.BaseDomain, h.cfg.DNSConfig, true)
|
|
if err != nil {
|
|
log.Error().
|
|
Caller().
|
|
Str("func", "generateMapResponse").
|
|
Err(err).
|
|
Msg("Cannot convert to node")
|
|
|
|
return nil, err
|
|
}
|
|
|
|
peers, err := h.getValidPeers(machine)
|
|
if err != nil {
|
|
log.Error().
|
|
Caller().
|
|
Str("func", "generateMapResponse").
|
|
Err(err).
|
|
Msg("Cannot fetch peers")
|
|
|
|
return nil, err
|
|
}
|
|
|
|
profiles := getMapResponseUserProfiles(*machine, peers)
|
|
|
|
nodePeers, err := peers.toNodes(h.cfg.BaseDomain, h.cfg.DNSConfig, true)
|
|
if err != nil {
|
|
log.Error().
|
|
Caller().
|
|
Str("func", "generateMapResponse").
|
|
Err(err).
|
|
Msg("Failed to convert peers to Tailscale nodes")
|
|
|
|
return nil, err
|
|
}
|
|
|
|
dnsConfig := getMapResponseDNSConfig(
|
|
h.cfg.DNSConfig,
|
|
h.cfg.BaseDomain,
|
|
*machine,
|
|
peers,
|
|
)
|
|
|
|
resp := tailcfg.MapResponse{
|
|
KeepAlive: false,
|
|
Node: node,
|
|
Peers: nodePeers,
|
|
DNSConfig: dnsConfig,
|
|
Domain: h.cfg.BaseDomain,
|
|
PacketFilter: h.aclRules,
|
|
DERPMap: h.DERPMap,
|
|
UserProfiles: profiles,
|
|
Debug: &tailcfg.Debug{
|
|
DisableLogTail: !h.cfg.LogTail.Enabled,
|
|
RandomizeClientPort: h.cfg.RandomizeClientPort,
|
|
},
|
|
}
|
|
|
|
log.Trace().
|
|
Str("func", "generateMapResponse").
|
|
Str("machine", mapRequest.Hostinfo.Hostname).
|
|
// Interface("payload", resp).
|
|
Msgf("Generated map response: %s", tailMapResponseToString(resp))
|
|
|
|
return &resp, nil
|
|
}
|
|
|
|
func (h *Headscale) getMapKeepAliveResponse(
|
|
machineKey key.MachinePublic,
|
|
mapRequest tailcfg.MapRequest,
|
|
) ([]byte, error) {
|
|
mapResponse := tailcfg.MapResponse{
|
|
KeepAlive: true,
|
|
}
|
|
var respBody []byte
|
|
var err error
|
|
if mapRequest.Compress == "zstd" {
|
|
src, err := json.Marshal(mapResponse)
|
|
if err != nil {
|
|
log.Error().
|
|
Caller().
|
|
Str("func", "getMapKeepAliveResponse").
|
|
Err(err).
|
|
Msg("Failed to marshal keepalive response for the client")
|
|
|
|
return nil, err
|
|
}
|
|
encoder, _ := zstd.NewWriter(nil)
|
|
srcCompressed := encoder.EncodeAll(src, nil)
|
|
respBody = h.privateKey.SealTo(machineKey, srcCompressed)
|
|
} else {
|
|
respBody, err = encode(mapResponse, &machineKey, h.privateKey)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
data := make([]byte, reservedResponseHeaderSize)
|
|
binary.LittleEndian.PutUint32(data, uint32(len(respBody)))
|
|
data = append(data, respBody...)
|
|
|
|
return data, nil
|
|
}
|
|
|
|
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().
|
|
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, "/"),
|
|
machineKey.String(),
|
|
)
|
|
} 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")
|
|
}
|