108 lines
3.6 KiB
Go
108 lines
3.6 KiB
Go
package application
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import (
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"encoding/base64"
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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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// Legacy headers, remove after 2022.1
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headers.Set("X-Auth-Username", c.PreferredUsername)
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headers.Set("X-Auth-Groups", strings.Join(c.Groups, "|"))
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headers.Set("X-Forwarded-Email", c.Email)
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headers.Set("X-Forwarded-Preferred-Username", c.PreferredUsername)
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headers.Set("X-Forwarded-User", c.Sub)
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// New headers, unique prefix
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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.proxyConfig.OidcConfiguration.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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func (a *Application) getTraefikForwardUrl(r *http.Request) *url.URL {
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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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a.log.WithError(err).Warning("Failed to parse URL from traefik")
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return r.URL
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}
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a.log.WithField("url", u.String()).Trace("traefik forwarded url")
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return u
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}
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func (a *Application) IsAllowlisted(r *http.Request) bool {
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url := r.URL
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// In Forward auth mode, we can't directly match against the requested URL
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// Since that would be /akprox/auth/...
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if a.Mode() == api.PROXYMODE_FORWARD_SINGLE || a.Mode() == api.PROXYMODE_FORWARD_DOMAIN {
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// For traefik, we can get the Upstream URL from headers
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// For nginx we can attempt to as well, but it's not guaranteed to work.
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if strings.HasPrefix(r.URL.Path, "/akprox/auth") {
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url = a.getTraefikForwardUrl(r)
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}
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}
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for _, u := 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 = url.Path
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} else {
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testString = url.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 u.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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