Move common parts of the protocol to dedicated file
This commit is contained in:
Juan Font Alonso
parent
e640c6df05
commit
d0898ecabc
281
api.go
281
api.go
|
|
@ -4,19 +4,15 @@ import (
|
|||
"bytes"
|
||||
"encoding/binary"
|
||||
"encoding/json"
|
||||
"errors"
|
||||
"fmt"
|
||||
"html/template"
|
||||
"io"
|
||||
"net/http"
|
||||
"strconv"
|
||||
"strings"
|
||||
"time"
|
||||
|
||||
"github.com/gorilla/mux"
|
||||
"github.com/klauspost/compress/zstd"
|
||||
"github.com/rs/zerolog/log"
|
||||
"gorm.io/gorm"
|
||||
"tailscale.com/tailcfg"
|
||||
"tailscale.com/types/key"
|
||||
)
|
||||
|
|
@ -77,62 +73,6 @@ func (h *Headscale) HealthHandler(
|
|||
respond(nil)
|
||||
}
|
||||
|
||||
// KeyHandler provides the Headscale pub key
|
||||
// Listens in /key.
|
||||
func (h *Headscale) KeyHandler(
|
||||
writer http.ResponseWriter,
|
||||
req *http.Request,
|
||||
) {
|
||||
// New Tailscale clients send a 'v' parameter to indicate the CurrentCapabilityVersion
|
||||
clientCapabilityStr := req.URL.Query().Get("v")
|
||||
if clientCapabilityStr != "" {
|
||||
clientCapabilityVersion, err := strconv.Atoi(clientCapabilityStr)
|
||||
if err != nil {
|
||||
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
|
||||
}
|
||||
|
||||
if clientCapabilityVersion >= NoiseCapabilityVersion {
|
||||
// Tailscale has a different key for the TS2021 protocol
|
||||
resp := tailcfg.OverTLSPublicKeyResponse{
|
||||
LegacyPublicKey: h.privateKey.Public(),
|
||||
PublicKey: h.noisePrivateKey.Public(),
|
||||
}
|
||||
writer.Header().Set("Content-Type", "application/json")
|
||||
writer.WriteHeader(http.StatusOK)
|
||||
err = json.NewEncoder(writer).Encode(resp)
|
||||
if err != nil {
|
||||
log.Error().
|
||||
Caller().
|
||||
Err(err).
|
||||
Msg("Failed to write response")
|
||||
}
|
||||
|
||||
return
|
||||
}
|
||||
}
|
||||
|
||||
// Old clients don't send a 'v' parameter, so we send the legacy public key
|
||||
writer.Header().Set("Content-Type", "text/plain; charset=utf-8")
|
||||
writer.WriteHeader(http.StatusOK)
|
||||
_, err := writer.Write([]byte(MachinePublicKeyStripPrefix(h.privateKey.Public())))
|
||||
if err != nil {
|
||||
log.Error().
|
||||
Caller().
|
||||
Err(err).
|
||||
Msg("Failed to write response")
|
||||
}
|
||||
}
|
||||
|
||||
type registerWebAPITemplateConfig struct {
|
||||
Key string
|
||||
}
|
||||
|
|
@ -211,191 +151,6 @@ func (h *Headscale) RegisterWebAPI(
|
|||
}
|
||||
}
|
||||
|
||||
// RegistrationHandler handles the actual registration process of a machine
|
||||
// Endpoint /machine/:mkey.
|
||||
func (h *Headscale) RegistrationHandler(
|
||||
writer http.ResponseWriter,
|
||||
req *http.Request,
|
||||
) {
|
||||
vars := mux.Vars(req)
|
||||
machineKeyStr, ok := vars["mkey"]
|
||||
if !ok || machineKeyStr == "" {
|
||||
log.Error().
|
||||
Str("handler", "RegistrationHandler").
|
||||
Msg("No machine ID in request")
|
||||
http.Error(writer, "No machine ID in request", http.StatusBadRequest)
|
||||
|
||||
return
|
||||
}
|
||||
|
||||
body, _ := io.ReadAll(req.Body)
|
||||
|
||||
var machineKey key.MachinePublic
|
||||
err := machineKey.UnmarshalText([]byte(MachinePublicKeyEnsurePrefix(machineKeyStr)))
|
||||
if err != nil {
|
||||
log.Error().
|
||||
Caller().
|
||||
Err(err).
|
||||
Msg("Cannot parse machine key")
|
||||
machineRegistrations.WithLabelValues("unknown", "web", "error", "unknown").Inc()
|
||||
http.Error(writer, "Cannot parse machine key", http.StatusBadRequest)
|
||||
|
||||
return
|
||||
}
|
||||
registerRequest := tailcfg.RegisterRequest{}
|
||||
err = decode(body, ®isterRequest, &machineKey, h.privateKey)
|
||||
if err != nil {
|
||||
log.Error().
|
||||
Caller().
|
||||
Err(err).
|
||||
Msg("Cannot decode message")
|
||||
machineRegistrations.WithLabelValues("unknown", "web", "error", "unknown").Inc()
|
||||
http.Error(writer, "Cannot decode message", http.StatusBadRequest)
|
||||
|
||||
return
|
||||
}
|
||||
|
||||
now := time.Now().UTC()
|
||||
machine, err := h.GetMachineByMachineKey(machineKey)
|
||||
if errors.Is(err, gorm.ErrRecordNotFound) {
|
||||
machineKeyStr := MachinePublicKeyStripPrefix(machineKey)
|
||||
|
||||
// If the machine has AuthKey set, handle registration via PreAuthKeys
|
||||
if registerRequest.Auth.AuthKey != "" {
|
||||
h.handleAuthKey(writer, req, machineKey, registerRequest)
|
||||
|
||||
return
|
||||
}
|
||||
|
||||
// Check if the node is waiting for interactive login.
|
||||
//
|
||||
// TODO(juan): We could use this field to improve our protocol implementation,
|
||||
// and hold the request until the client closes it, or the interactive
|
||||
// login is completed (i.e., the user registers the machine).
|
||||
// This is not implemented yet, as it is no strictly required. The only side-effect
|
||||
// is that the client will hammer headscale with requests until it gets a
|
||||
// successful RegisterResponse.
|
||||
if registerRequest.Followup != "" {
|
||||
if _, ok := h.registrationCache.Get(NodePublicKeyStripPrefix(registerRequest.NodeKey)); ok {
|
||||
log.Debug().
|
||||
Caller().
|
||||
Str("machine", registerRequest.Hostinfo.Hostname).
|
||||
Str("node_key", registerRequest.NodeKey.ShortString()).
|
||||
Str("node_key_old", registerRequest.OldNodeKey.ShortString()).
|
||||
Str("follow_up", registerRequest.Followup).
|
||||
Msg("Machine is waiting for interactive login")
|
||||
|
||||
ticker := time.NewTicker(registrationHoldoff)
|
||||
select {
|
||||
case <-req.Context().Done():
|
||||
return
|
||||
case <-ticker.C:
|
||||
h.handleMachineRegistrationNew(writer, req, machineKey, registerRequest)
|
||||
|
||||
return
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
log.Info().
|
||||
Caller().
|
||||
Str("machine", registerRequest.Hostinfo.Hostname).
|
||||
Str("node_key", registerRequest.NodeKey.ShortString()).
|
||||
Str("node_key_old", registerRequest.OldNodeKey.ShortString()).
|
||||
Str("follow_up", registerRequest.Followup).
|
||||
Msg("New machine not yet in the database")
|
||||
|
||||
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
|
||||
}
|
||||
|
||||
// The machine did not have a key to authenticate, which means
|
||||
// that we rely on a method that calls back some how (OpenID or CLI)
|
||||
// We create the machine and then keep it around until a callback
|
||||
// happens
|
||||
newMachine := Machine{
|
||||
MachineKey: machineKeyStr,
|
||||
Hostname: registerRequest.Hostinfo.Hostname,
|
||||
GivenName: givenName,
|
||||
NodeKey: NodePublicKeyStripPrefix(registerRequest.NodeKey),
|
||||
LastSeen: &now,
|
||||
Expiry: &time.Time{},
|
||||
}
|
||||
|
||||
if !registerRequest.Expiry.IsZero() {
|
||||
log.Trace().
|
||||
Caller().
|
||||
Str("machine", registerRequest.Hostinfo.Hostname).
|
||||
Time("expiry", registerRequest.Expiry).
|
||||
Msg("Non-zero expiry time requested")
|
||||
newMachine.Expiry = ®isterRequest.Expiry
|
||||
}
|
||||
|
||||
h.registrationCache.Set(
|
||||
newMachine.NodeKey,
|
||||
newMachine,
|
||||
registerCacheExpiration,
|
||||
)
|
||||
|
||||
h.handleMachineRegistrationNew(writer, req, machineKey, registerRequest)
|
||||
|
||||
return
|
||||
}
|
||||
|
||||
// The machine is already registered, so we need to pass through reauth or key update.
|
||||
if machine != nil {
|
||||
// If the NodeKey stored in headscale is the same as the key presented in a registration
|
||||
// request, then we have a node that is either:
|
||||
// - Trying to log out (sending a expiry in the past)
|
||||
// - A valid, registered machine, looking for the node map
|
||||
// - Expired machine wanting to reauthenticate
|
||||
if machine.NodeKey == NodePublicKeyStripPrefix(registerRequest.NodeKey) {
|
||||
// The client sends an Expiry in the past if the client is requesting to expire the key (aka logout)
|
||||
// https://github.com/tailscale/tailscale/blob/main/tailcfg/tailcfg.go#L648
|
||||
if !registerRequest.Expiry.IsZero() &&
|
||||
registerRequest.Expiry.UTC().Before(now) {
|
||||
h.handleMachineLogOut(writer, req, machineKey, *machine)
|
||||
|
||||
return
|
||||
}
|
||||
|
||||
// If machine is not expired, and is register, we have a already accepted this machine,
|
||||
// let it proceed with a valid registration
|
||||
if !machine.isExpired() {
|
||||
h.handleMachineValidRegistration(writer, req, machineKey, *machine)
|
||||
|
||||
return
|
||||
}
|
||||
}
|
||||
|
||||
// The NodeKey we have matches OldNodeKey, which means this is a refresh after a key expiration
|
||||
if machine.NodeKey == NodePublicKeyStripPrefix(registerRequest.OldNodeKey) &&
|
||||
!machine.isExpired() {
|
||||
h.handleMachineRefreshKey(
|
||||
writer,
|
||||
req,
|
||||
machineKey,
|
||||
registerRequest,
|
||||
*machine,
|
||||
)
|
||||
|
||||
return
|
||||
}
|
||||
|
||||
// The machine has expired
|
||||
h.handleMachineExpired(writer, req, machineKey, registerRequest, *machine)
|
||||
|
||||
return
|
||||
}
|
||||
}
|
||||
|
||||
func (h *Headscale) getLegacyMapResponseData(
|
||||
machineKey key.MachinePublic,
|
||||
mapRequest tailcfg.MapRequest,
|
||||
|
|
@ -436,42 +191,6 @@ func (h *Headscale) getLegacyMapResponseData(
|
|||
return data, 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 == ZstdCompression {
|
||||
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,
|
||||
|
|
|
|||
|
|
@ -0,0 +1,66 @@
|
|||
package headscale
|
||||
|
||||
import (
|
||||
"encoding/json"
|
||||
"net/http"
|
||||
"strconv"
|
||||
|
||||
"github.com/rs/zerolog/log"
|
||||
"tailscale.com/tailcfg"
|
||||
)
|
||||
|
||||
// KeyHandler provides the Headscale pub key
|
||||
// Listens in /key.
|
||||
func (h *Headscale) KeyHandler(
|
||||
writer http.ResponseWriter,
|
||||
req *http.Request,
|
||||
) {
|
||||
// New Tailscale clients send a 'v' parameter to indicate the CurrentCapabilityVersion
|
||||
clientCapabilityStr := req.URL.Query().Get("v")
|
||||
if clientCapabilityStr != "" {
|
||||
clientCapabilityVersion, err := strconv.Atoi(clientCapabilityStr)
|
||||
if err != nil {
|
||||
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
|
||||
}
|
||||
|
||||
if clientCapabilityVersion >= NoiseCapabilityVersion {
|
||||
// Tailscale has a different key for the TS2021 protocol
|
||||
resp := tailcfg.OverTLSPublicKeyResponse{
|
||||
LegacyPublicKey: h.privateKey.Public(),
|
||||
PublicKey: h.noisePrivateKey.Public(),
|
||||
}
|
||||
writer.Header().Set("Content-Type", "application/json")
|
||||
writer.WriteHeader(http.StatusOK)
|
||||
err = json.NewEncoder(writer).Encode(resp)
|
||||
if err != nil {
|
||||
log.Error().
|
||||
Caller().
|
||||
Err(err).
|
||||
Msg("Failed to write response")
|
||||
}
|
||||
|
||||
return
|
||||
}
|
||||
}
|
||||
|
||||
// Old clients don't send a 'v' parameter, so we send the legacy public key
|
||||
writer.Header().Set("Content-Type", "text/plain; charset=utf-8")
|
||||
writer.WriteHeader(http.StatusOK)
|
||||
_, err := writer.Write([]byte(MachinePublicKeyStripPrefix(h.privateKey.Public())))
|
||||
if err != nil {
|
||||
log.Error().
|
||||
Caller().
|
||||
Err(err).
|
||||
Msg("Failed to write response")
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,47 @@
|
|||
package headscale
|
||||
|
||||
import (
|
||||
"encoding/binary"
|
||||
"encoding/json"
|
||||
|
||||
"github.com/klauspost/compress/zstd"
|
||||
"github.com/rs/zerolog/log"
|
||||
"tailscale.com/tailcfg"
|
||||
"tailscale.com/types/key"
|
||||
)
|
||||
|
||||
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 == ZstdCompression {
|
||||
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
|
||||
}
|
||||
Loading…
Reference in New Issue