86 lines
2.7 KiB
Go
86 lines
2.7 KiB
Go
// Package authproxy implements a connector which relies on external
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// authentication (e.g. mod_auth in Apache2) and returns an identity with the
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// HTTP header X-Remote-User as verified email.
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package authproxy
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import (
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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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"github.com/dexidp/dex/connector"
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"github.com/dexidp/dex/pkg/log"
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)
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// Config holds the configuration parameters for a connector which returns an
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// identity with the HTTP header X-Remote-User as verified email,
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// X-Remote-Group and configured staticGroups as user's group.
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// Headers retrieved to fetch user's email and group can be configured
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// with userHeader and groupHeader.
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type Config struct {
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UserHeader string `json:"userHeader"`
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GroupHeader string `json:"groupHeader"`
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Groups []string `json:"staticGroups"`
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}
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// Open returns an authentication strategy which requires no user interaction.
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func (c *Config) Open(id string, logger log.Logger) (connector.Connector, error) {
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userHeader := c.UserHeader
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if userHeader == "" {
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userHeader = "X-Remote-User"
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}
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groupHeader := c.GroupHeader
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if groupHeader == "" {
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groupHeader = "X-Remote-Group"
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}
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return &callback{userHeader: userHeader, groupHeader: groupHeader, logger: logger, pathSuffix: "/" + id, groups: c.Groups}, nil
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}
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// Callback is a connector which returns an identity with the HTTP header
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// X-Remote-User as verified email.
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type callback struct {
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userHeader string
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groupHeader string
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groups []string
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logger log.Logger
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pathSuffix string
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}
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// LoginURL returns the URL to redirect the user to login with.
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func (m *callback) LoginURL(s connector.Scopes, callbackURL, state string) (string, error) {
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u, err := url.Parse(callbackURL)
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if err != nil {
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return "", fmt.Errorf("failed to parse callbackURL %q: %v", callbackURL, err)
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}
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u.Path += m.pathSuffix
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v := u.Query()
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v.Set("state", state)
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u.RawQuery = v.Encode()
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return u.String(), nil
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}
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// HandleCallback parses the request and returns the user's identity
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func (m *callback) HandleCallback(s connector.Scopes, r *http.Request) (connector.Identity, error) {
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remoteUser := r.Header.Get(m.userHeader)
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if remoteUser == "" {
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return connector.Identity{}, fmt.Errorf("required HTTP header %s is not set", m.userHeader)
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}
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groups := m.groups
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headerGroup := r.Header.Get(m.groupHeader)
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if headerGroup != "" {
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splitheaderGroup := strings.Split(headerGroup, ",")
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for i, v := range splitheaderGroup {
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splitheaderGroup[i] = strings.TrimSpace(v)
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}
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groups = append(splitheaderGroup, groups...)
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}
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return connector.Identity{
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UserID: remoteUser, // TODO: figure out if this is a bad ID value.
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Email: remoteUser,
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EmailVerified: true,
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Groups: groups,
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}, nil
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}
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