133 lines
4.2 KiB
Go
133 lines
4.2 KiB
Go
package application
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import (
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"context"
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"encoding/base64"
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"errors"
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"fmt"
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"net/http"
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"net/url"
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"strings"
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"goauthentik.io/api"
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"goauthentik.io/internal/constants"
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)
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func (a *Application) addHeaders(headers http.Header, c *Claims) {
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// https://goauthentik.io/docs/providers/proxy/proxy
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headers.Set("X-authentik-username", c.PreferredUsername)
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headers.Set("X-authentik-groups", strings.Join(c.Groups, "|"))
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headers.Set("X-authentik-email", c.Email)
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headers.Set("X-authentik-name", c.Name)
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headers.Set("X-authentik-uid", c.Sub)
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headers.Set("X-authentik-jwt", c.RawToken)
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// System headers
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headers.Set("X-authentik-meta-jwks", a.endpint.JwksUri)
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headers.Set("X-authentik-meta-outpost", a.outpostName)
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headers.Set("X-authentik-meta-provider", a.proxyConfig.Name)
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headers.Set("X-authentik-meta-app", a.proxyConfig.AssignedApplicationSlug)
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headers.Set("X-authentik-meta-version", constants.OutpostUserAgent())
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userAttributes := c.Proxy.UserAttributes
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// Attempt to set basic auth based on user's attributes
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if *a.proxyConfig.BasicAuthEnabled {
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var ok bool
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var password string
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if password, ok = userAttributes[*a.proxyConfig.BasicAuthPasswordAttribute].(string); !ok {
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password = ""
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}
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// Check if we should use email or a custom attribute as username
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var username string
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if username, ok = userAttributes[*a.proxyConfig.BasicAuthUserAttribute].(string); !ok {
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username = c.Email
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}
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authVal := base64.StdEncoding.EncodeToString([]byte(username + ":" + password))
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a.log.WithField("username", username).Trace("setting http basic auth")
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headers.Set("Authorization", fmt.Sprintf("Basic %s", authVal))
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}
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// Check if user has additional headers set that we should sent
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if additionalHeaders, ok := userAttributes["additionalHeaders"].(map[string]interface{}); ok {
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a.log.WithField("headers", additionalHeaders).Trace("setting additional headers")
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if additionalHeaders == nil {
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return
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}
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for key, value := range additionalHeaders {
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headers.Set(key, toString(value))
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}
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}
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}
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// getTraefikForwardUrl See https://doc.traefik.io/traefik/middlewares/forwardauth/
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func (a *Application) getTraefikForwardUrl(r *http.Request) (*url.URL, error) {
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u, err := url.Parse(fmt.Sprintf(
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"%s://%s%s",
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r.Header.Get("X-Forwarded-Proto"),
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r.Header.Get("X-Forwarded-Host"),
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r.Header.Get("X-Forwarded-Uri"),
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))
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if err != nil {
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return nil, err
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}
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a.log.WithField("url", u.String()).Trace("traefik forwarded url")
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return u, nil
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}
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// getNginxForwardUrl See https://github.com/kubernetes/ingress-nginx/blob/main/rootfs/etc/nginx/template/nginx.tmpl
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func (a *Application) getNginxForwardUrl(r *http.Request) (*url.URL, error) {
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ou := r.Header.Get("X-Original-URI")
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if ou != "" {
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// Turn this full URL into a relative URL
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u := &url.URL{
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Host: "",
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Scheme: "",
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Path: ou,
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}
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a.log.WithField("url", u.String()).Info("building forward URL from X-Original-URI")
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return u, nil
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}
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h := r.Header.Get("X-Original-URL")
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if len(h) < 1 {
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return nil, errors.New("no forward URL found")
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}
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u, err := url.Parse(h)
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if err != nil {
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a.log.WithError(err).Warning("failed to parse URL from nginx")
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return nil, err
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}
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a.log.WithField("url", u.String()).Trace("nginx forwarded url")
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return u, nil
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}
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func (a *Application) ReportMisconfiguration(r *http.Request, msg string, fields map[string]interface{}) {
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fields["message"] = msg
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a.log.WithFields(fields).Error("Reporting configuration error")
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req := api.EventRequest{
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Action: api.EVENTACTIONS_CONFIGURATION_ERROR,
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App: "authentik.providers.proxy", // must match python apps.py name
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ClientIp: *api.NewNullableString(api.PtrString(r.RemoteAddr)),
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Context: &fields,
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}
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_, _, err := a.ak.Client.EventsApi.EventsEventsCreate(context.Background()).EventRequest(req).Execute()
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if err != nil {
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a.log.WithError(err).Warning("failed to report configuration error")
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}
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}
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func (a *Application) IsAllowlisted(u *url.URL) bool {
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for _, ur := range a.UnauthenticatedRegex {
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var testString string
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if a.Mode() == api.PROXYMODE_PROXY || a.Mode() == api.PROXYMODE_FORWARD_SINGLE {
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testString = u.Path
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} else {
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testString = u.String()
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}
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a.log.WithField("regex", u.String()).WithField("url", testString).Trace("Matching URL against allow list")
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if ur.MatchString(testString) {
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return true
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}
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}
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return false
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}
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