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https://github.com/juanfont/headscale.git
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218138afee
expand user, add claims to user This commit expands the user table with additional fields that can be retrieved from OIDC providers (and other places) and uses this data in various tailscale response objects if it is available. This is the beginning of implementing https://docs.google.com/document/d/1X85PMxIaVWDF6T_UPji3OeeUqVBcGj_uHRM5CI-AwlY/edit trying to make OIDC more coherant and maintainable in addition to giving the user a better experience and integration with a provider. remove usernames in magic dns, normalisation of emails this commit removes the option to have usernames as part of MagicDNS domains and headscale will now align with Tailscale, where there is a root domain, and the machine name. In addition, the various normalisation functions for dns names has been made lighter not caring about username and special character that wont occur. Email are no longer normalised as part of the policy processing. untagle oidc and regcache, use typed cache This commits stops reusing the registration cache for oidc purposes and switches the cache to be types and not use any allowing the removal of a bunch of casting. try to make reauth/register branches clearer in oidc Currently there was a function that did a bunch of stuff, finding the machine key, trying to find the node, reauthing the node, returning some status, and it was called validate which was very confusing. This commit tries to split this into what to do if the node exists, if it needs to register etc. Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>
254 lines
6.2 KiB
Go
254 lines
6.2 KiB
Go
package hscontrol
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import (
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"bytes"
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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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"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/rs/zerolog/log"
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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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// 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, but we only have good support for it
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// since https://github.com/tailscale/tailscale/pull/4323 (Noise in any HTTPS port).
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//
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// Related to this change, there is https://github.com/tailscale/tailscale/pull/5379,
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// where CapabilityVersion 39 is introduced to indicate #4323 was merged.
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//
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// See also https://github.com/tailscale/tailscale/blob/main/tailcfg/tailcfg.go
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NoiseCapabilityVersion = 39
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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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)
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var ErrRegisterMethodCLIDoesNotSupportExpire = errors.New(
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"machines registered with CLI does not support expire",
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)
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var ErrNoCapabilityVersion = errors.New("no capability version set")
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func parseCabailityVersion(req *http.Request) (tailcfg.CapabilityVersion, error) {
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clientCapabilityStr := req.URL.Query().Get("v")
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if clientCapabilityStr == "" {
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return 0, ErrNoCapabilityVersion
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}
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clientCapabilityVersion, err := strconv.Atoi(clientCapabilityStr)
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if err != nil {
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return 0, fmt.Errorf("failed to parse capability version: %w", err)
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}
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return tailcfg.CapabilityVersion(clientCapabilityVersion), 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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capVer, err := parseCabailityVersion(req)
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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("could not get capability version")
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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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return
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}
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log.Debug().
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Str("handler", "/key").
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Int("cap_ver", int(capVer)).
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Msg("New noise client")
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// TS2021 (Tailscale v2 protocol) requires to have a different key
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if capVer >= NoiseCapabilityVersion {
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resp := tailcfg.OverTLSPublicKeyResponse{
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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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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.db.PingDB(req.Context()); 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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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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<meta name=viewport content="width=device-width, initial-scale=1">
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<style>
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body {
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font-family: sans;
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}
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code {
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display: block;
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padding: 20px;
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border: 1px solid #bbb;
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background-color: #eee;
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}
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</style>
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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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<code>headscale nodes register --user USERNAME --key {{.Key}}</code>
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</body>
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</html>
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`))
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type AuthProviderWeb struct {
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serverURL string
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}
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func NewAuthProviderWeb(serverURL string) *AuthProviderWeb {
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return &AuthProviderWeb{
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serverURL: serverURL,
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}
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}
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func (a *AuthProviderWeb) AuthURL(mKey key.MachinePublic) string {
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return fmt.Sprintf(
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"%s/register/%s",
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strings.TrimSuffix(a.serverURL, "/"),
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mKey.String())
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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 (a *AuthProviderWeb) RegisterHandler(
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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 := vars["mkey"]
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// We need to make sure we dont open for XSS style injections, if the parameter that
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// is passed as a key is not parsable/validated as a NodePublic key, then fail to render
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// the template and log an error.
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var machineKey key.MachinePublic
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err := machineKey.UnmarshalText(
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[]byte(machineKeyStr),
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)
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if err != nil {
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log.Warn().Err(err).Msg("Failed to parse incoming machinekey")
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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: machineKey.String(),
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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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